diff --git a/app/camera_config.py b/app/camera_config.py
index 5eaa1fb..2ccff69 100644
--- a/app/camera_config.py
+++ b/app/camera_config.py
@@ -61,3 +61,15 @@ SNAPSHOT_TIMEOUT = float(os.getenv("SNAPSHOT_TIMEOUT", "8.0"))
 
 # NATS subject cameras are published on (consumed by the shared ingester).
 CAMERA_NATS_SUBJECT = os.getenv("CAMERA_NATS_SUBJECT", "events.camera")
+
+
+# ── UDOT IBI 511 traffic cameras ──────────────────────────────────────────
+# DataTables endpoint (POST form-encoded; server caps at 100 rows/page no
+# matter what `length` is sent). No API key. Snapshot stills live at a stable
+# /map/Cctv/{id} URL — same URL always serves the latest frame, so we store
+# the URL and never scrape every frame ourselves.
+UDOT_IBI_URL = "https://prod-ut.ibi511.com/List/GetData/Cameras"
+UDOT_IBI_BASE = "https://prod-ut.ibi511.com"
+UDOT_IBI_PAGE_SIZE = 100
+# Safety cap on pages per cycle so a runaway recordsTotal cannot fan out.
+UDOT_IBI_MAX_PAGES = int(os.getenv("UDOT_IBI_MAX_PAGES", "40"))
diff --git a/app/camera_scraper.py b/app/camera_scraper.py
index e968567..10dde21 100644
--- a/app/camera_scraper.py
+++ b/app/camera_scraper.py
@@ -38,6 +38,7 @@ from camera_config import (
     CAMERA_SOURCE_URLS, CAMERA_REQUEST_DELAY, CAMERA_MAX_PER_SOURCE,
     NOMINATIM_URL, NOMINATIM_MIN_INTERVAL, USER_AGENT,
     SNAPSHOT_CACHE_DIR, SNAPSHOT_TTL_SECONDS, SNAPSHOT_TIMEOUT,
+    UDOT_IBI_URL, UDOT_IBI_BASE, UDOT_IBI_PAGE_SIZE, UDOT_IBI_MAX_PAGES,
 )
 from camera_models import cameras
 from database import async_session
@@ -115,6 +116,15 @@ class RateLimitedClient:
         self._last[host] = time.monotonic()
         return await self.client.get(url, **kw)
 
+    async def post(self, url: str, **kw) -> httpx.Response:
+        host = urlparse(url).netloc
+        now = time.monotonic()
+        wait = self._last.get(host, 0.0) + self._delay - now
+        if wait > 0:
+            await asyncio.sleep(wait)
+        self._last[host] = time.monotonic()
+        return await self.client.post(url, **kw)
+
     async def aclose(self):
         await self.client.aclose()
 
@@ -380,6 +390,83 @@ def parse_caltrans_json(text: str, source_name: str) -> list[dict]:
     return out
 
 
+# ── UDOT IBI 511 ──────────────────────────────────────────────────────────
+# Utah bbox (lat 36.9–42.1, lon -114.2–-108.9). WKT is `POINT (lng lat)`.
+_UDOT_IBI_MIN_LAT, _UDOT_IBI_MAX_LAT = 36.9, 42.1
+_UDOT_IBI_MIN_LON, _UDOT_IBI_MAX_LON = -114.2, -108.9
+_UDOT_WKT_POINT_RE = re.compile(
+    r"POINT\s*\(\s*(-?\d+(?:\.\d+)?)\s+(-?\d+(?:\.\d+)?)\s*\)", re.I,
+)
+
+
+def parse_udot_ibi_page(text: str, source_name: str = "udot") -> list[dict]:
+    """Parse one UDOT IBI 511 DataTables camera page (`{"data": [...]}`).
+
+    Skips rows whose first image is `blocked` or `disabled`, and drops any
+    point outside the Utah bbox. The `/map/Cctv/{id}` URL is a stable identity
+    (always serves the latest frame), so it is stored as both source_url and
+    snapshot_url — we never scrape frames ourselves.
+    """
+    try:
+        payload = json.loads(text)
+    except (json.JSONDecodeError, ValueError):
+        return []
+    rows = payload.get("data") if isinstance(payload, dict) else None
+    if not isinstance(rows, list):
+        return []
+    out: list[dict] = []
+    for row in rows:
+        if not isinstance(row, dict):
+            continue
+        cam_id = row.get("id")
+        images = row.get("images") or []
+        if cam_id is None or not images:
+            continue
+        img = images[0] or {}
+        if img.get("blocked") or img.get("disabled"):
+            continue
+        lon = lat = None
+        try:
+            wkt = (row.get("latLng") or {}).get("geography") or {}
+            wkt = wkt.get("wellKnownText") or ""
+            m = _UDOT_WKT_POINT_RE.match(str(wkt).strip())
+            if m:
+                lon, lat = float(m.group(1)), float(m.group(2))
+        except (AttributeError, TypeError, ValueError):
+            lon = lat = None
+        if lat is None or lon is None:
+            continue
+        if not (_UDOT_IBI_MIN_LAT <= lat <= _UDOT_IBI_MAX_LAT
+                and _UDOT_IBI_MIN_LON <= lon <= _UDOT_IBI_MAX_LON):
+            continue
+        snap = f"{UDOT_IBI_BASE}/map/Cctv/{cam_id}"
+        roadway, direction, location = (
+            row.get("roadway"), row.get("direction"), row.get("location"),
+        )
+        name = ", ".join(
+            str(b) for b in (roadway, direction, location)
+            if b and str(b).strip() and str(b).strip().lower() != "unknown"
+        ) or None
+        out.append({
+            "source_url": snap,
+            "snapshot_url": snap,
+            "discovery_source": source_name,
+            "location_lat": lat,
+            "location_lon": lon,
+            "location_name": name,
+            "vendor": "UDOT",
+            "device_type": "http",
+            "raw": {
+                "udot_id": cam_id,
+                "agency": row.get("source"),
+                "source_id": row.get("sourceId"),
+                "roadway": roadway,
+                "direction": direction,
+            },
+        })
+    return out
+
+
 # Oregon DOT TripCheck inventory bounding box (approx state extent).
 ODOT_BBOX = (41.9, 46.3, -124.6, -116.4)  # lat_min, lat_max, lon_min, lon_max
 
@@ -672,6 +759,54 @@ async def scrape_source(client: RateLimitedClient, geo: Geocoder,
     return out
 
 
+# ── UDOT IBI 511 paginated fetcher ────────────────────────────────────────
+
+async def scrape_udot_ibi(client: RateLimitedClient) -> list[dict]:
+    """Page through the UDOT IBI 511 DataTables endpoint and normalize.
+
+    POSTs `start`/`length` form fields (server caps at 100 rows/page), walking
+    pages until `recordsTotal` is exhausted or UDOT_IBI_MAX_PAGES is hit.
+    """
+    out: list[dict] = []
+    seen: set[str] = set()
+    start = 0
+    for _ in range(UDOT_IBI_MAX_PAGES):
+        try:
+            resp = await client.post(
+                UDOT_IBI_URL,
+                data={
+                    "start": str(start),
+                    "length": str(UDOT_IBI_PAGE_SIZE),
+                    "lang": "en-US",
+                },
+                headers={"X-Requested-With": "XMLHttpRequest"},
+            )
+            resp.raise_for_status()
+            body = resp.text
+        except Exception:  # noqa: BLE001
+            logger.exception("failed to fetch UDOT IBI page start=%d", start)
+            break
+        try:
+            payload = json.loads(body)
+        except ValueError:
+            logger.warning("UDOT IBI non-JSON response at start=%d", start)
+            break
+        total = int(payload.get("recordsTotal") or 0)
+        rows = payload.get("data") or []
+        if not isinstance(rows, list) or not rows:
+            break
+        for cam in parse_udot_ibi_page(body, "udot"):
+            if cam["source_url"] in seen:
+                continue
+            seen.add(cam["source_url"])
+            out.append(cam)
+        if start + len(rows) >= total:
+            break
+        start += len(rows)
+    logger.info("UDOT IBI yielded %d cameras", len(out))
+    return out
+
+
 # ── Persistence ────────────────────────────────────────────────────────────
 
 async def upsert_cameras(cams: list[dict]) -> int:
@@ -723,6 +858,7 @@ async def run_cycle() -> int:
     try:
         results = await asyncio.gather(
             *(scrape_source(client, geo, s) for s in CAMERA_SOURCE_URLS),
+            scrape_udot_ibi(client),
             return_exceptions=True,
         )
         all_cams: list[dict] = []
diff --git a/app/config.py b/app/config.py
index d93f492..b2bdab8 100644
--- a/app/config.py
+++ b/app/config.py
@@ -71,6 +71,9 @@ FIRMS_DATASETS = [d.strip() for d in _FIRMS_DATASETS_RAW.split(",") if d.strip()
 OSINT_USER_AGENT = os.getenv(
     "OSINT_USER_AGENT", "osint-dashboard/1.0 (self-hosted; lancewalters94@gmail.com)"
 )
+# Nominatim reverse (GET /api/place). Camera scraper has its own copy in camera_config.
+NOMINATIM_URL = os.getenv("NOMINATIM_URL", "https://nominatim.openstreetmap.org")
+NOMINATIM_MIN_INTERVAL = float(os.getenv("NOMINATIM_MIN_INTERVAL", "1.0"))
 
 # Self-hosted TiTiler (warps Sentinel-1 signed COGs into XYZ tiles on the Pi).
 # TITILER_PUBLIC_BASE is the same-origin path prefix the browser hits through
diff --git a/app/live_layers.py b/app/live_layers.py
index 1a0e819..bbc9d71 100644
--- a/app/live_layers.py
+++ b/app/live_layers.py
@@ -155,6 +155,12 @@ def overlay_catalog() -> dict:
             "endpoint": "/api/map/gpsjam",
             "attribution": "GPSJAM / John Wiseman / ADS-B Exchange",
         },
+        "infra_nuclear": {
+            "id": "infra_nuclear",
+            "kind": "points",
+            "endpoint": "/api/infrastructure?types=nuclear",
+            "attribution": "OpenStreetMap contributors / Overpass API",
+        },
         "conflicts": {
             "id": "conflicts",
             "kind": "points",
@@ -1444,3 +1450,104 @@ async def fetch_gpsjam(date: str) -> dict:
         return gpsjam_csv_to_geojson(resp.text)
 
     return await _ttl_get(f"gpsjam:{date}", GPSJAM_TTL, _load)
+# ── Infrastructure (Overpass) ───────────────────────────────────────────────
+
+
+OVERPASS_INTERPRETER = "https://overpass-api.de/api/interpreter"
+# One in-flight query per quantized bbox (the per-key lock in _ttl_get). Overpass
+# asks for a 25s server timeout in-band; the client gives it 30s of headroom.
+OVERPASS_TIMEOUT = httpx.Timeout(30.0, connect=5.0)
+INFRA_TTL = 24 * 3600  # 24h per quantized bbox — static infrastructure
+
+# `types=` enum. Nuclear ships first; military/hospital slot in behind the same
+# query template without touching the transport. Overpass bbox is
+# (south, west, north, east), i.e. (minlat, minlon, maxlat, maxlon).
+_INFRA_QUERIES: dict[str, str] = {
+    "nuclear": (
+        '[out:json][timeout:25];\n'
+        'nwr["power"="plant"]["plant:source"="nuclear"]({bbox});\n'
+        'out center;'
+    ),
+}
+
+
+def infra_query(type_: str, minlon: float, minlat: float, maxlon: float, maxlat: float) -> str:
+    """Render one Overpass query with the bbox substituted in south,west,north,east."""
+    bbox = f"{minlat},{minlon},{maxlat},{maxlon}"
+    return _INFRA_QUERIES[type_].replace("{bbox}", bbox)
+
+
+def normalize_infra_element(elem: dict, type_: str) -> dict | None:
+    """Map one Overpass element to ``{id, name, lat, lon, type, extra}``.
+
+    ``out center`` gives nodes their own ``lat``/``lon`` and ways/relations a
+    ``center``. Elements with no usable coordinate are dropped.
+    """
+    etype = elem.get("type")
+    eid = elem.get("id")
+    if eid is None:
+        return None
+    if etype == "node":
+        lat, lon = elem.get("lat"), elem.get("lon")
+    else:
+        center = elem.get("center") or {}
+        lat, lon = center.get("lat"), center.get("lon")
+    if lat is None or lon is None:
+        return None
+    tags = elem.get("tags") or {}
+    name = tags.get("name") or tags.get("ref") or f"{etype}/{eid}"
+    extra = {k: v for k, v in tags.items() if k != "name"}
+    return {
+        "id": f"{etype}/{eid}",
+        "name": name,
+        "lat": lat,
+        "lon": lon,
+        "type": type_,
+        "extra": extra,
+    }
+
+
+def overpass_nuclear_to_markers(data: dict) -> list[dict]:
+    """Convert an Overpass JSON response to normalized nuclear markers."""
+    markers = []
+    for elem in data.get("elements") or []:
+        marker = normalize_infra_element(elem, "nuclear")
+        if marker is not None:
+            markers.append(marker)
+    return markers
+
+
+async def fetch_infrastructure(types: str, bbox: str) -> list[dict]:
+    """Fetch Overpass infrastructure markers, cached 24h per quantized bbox.
+
+    ``types`` is a single supported enum value (``nuclear`` for now). ``bbox``
+    is ``minlon,minlat,maxlon,maxlat``.
+    """
+    requested = [t.strip() for t in types.split(",") if t.strip()]
+    minlon, minlat, maxlon, maxlat = parse_bbox(bbox)
+    key = f"infra:{','.join(requested)}:{bbox_cell_key(bbox)}"
+
+    async def _load() -> list[dict]:
+        # One query per requested type, concatenated. Nuclear is the only type
+        # today; the loop keeps the shape ready for military/hospital.
+        out: list[dict] = []
+        for type_ in requested:
+            query = infra_query(type_, minlon, minlat, maxlon, maxlat)
+            if _http is None:
+                async with httpx.AsyncClient(
+                    timeout=OVERPASS_TIMEOUT, follow_redirects=True,
+                    headers=_headers(),
+                ) as client:
+                    resp = await client.post(OVERPASS_INTERPRETER, data={"data": query})
+                    resp.raise_for_status()
+                    out.extend(overpass_nuclear_to_markers(resp.json()))
+            else:
+                resp = await _http.post(
+                    OVERPASS_INTERPRETER, data={"data": query},
+                    timeout=OVERPASS_TIMEOUT,
+                )
+                resp.raise_for_status()
+                out.extend(overpass_nuclear_to_markers(resp.json()))
+        return out
+
+    return await _ttl_get(key, float(INFRA_TTL), _load)
diff --git a/app/main.py b/app/main.py
index 1621a07..e53bd9b 100644
--- a/app/main.py
+++ b/app/main.py
@@ -59,8 +59,9 @@ from live_layers import (
     fetch_aircraft, fetch_fire_incidents, fetch_fire_perimeters,
     fetch_gpsjam, fetch_planespotters_photo, fetch_radar_meta, fetch_sentinel1,
     fetch_storms, fetch_trains, fetch_vessels, fetch_weather_alerts,
-    overlay_catalog, parse_bbox, UpstreamRateLimited,
+    fetch_infrastructure, overlay_catalog, parse_bbox, UpstreamRateLimited,
 )
+from place import reverse_geocode
 
 logging.basicConfig(level=logging.INFO)
 logger = structlog.get_logger("osint.dashboard")
@@ -1844,6 +1845,25 @@ async def list_storms():
         _upstream_or_502(exc, "storms")
 
 
+@app.get("/api/place")
+async def get_place(
+    lat: float = Query(..., ge=-90, le=90),
+    lon: float = Query(..., ge=-180, le=180),
+):
+    """Nominatim reverse geocode for the map \"What's here?\" dossier.
+
+    Identifying ``OSINT_USER_AGENT``, 1 req/s, 60s cache, 500 keys. The HUD
+    lists already-loaded overlay entities client-side — this route does not
+    refetch aircraft/vessels/cameras/fires.
+    """
+    try:
+        return overlay_json(await reverse_geocode(lat, lon), 60)
+    except ValueError as exc:
+        raise HTTPException(422, str(exc)) from exc
+    except Exception as exc:
+        _upstream_or_502(exc, "nominatim")
+
+
 _GPSJAM_DATE = re.compile(r"^\d{4}-\d{2}-\d{2}$")
 
 
@@ -1879,6 +1899,39 @@ async def map_gpsjam(
     return overlay_json(fc, 3600)
 
 
+_INFRA_TYPES = frozenset({"nuclear"})
+
+
+@app.get("/api/infrastructure")
+async def api_infrastructure(
+    types: str = Query(..., description="comma-separated enum (nuclear)"),
+    bbox: str | None = Query(None, description="minlon,minlat,maxlon,maxlat"),
+):
+    """Overpass-derived static infrastructure markers (nuclear power plants).
+
+    ``bbox`` is required; ``types`` is a comma-separated subset of ``nuclear``.
+    Fetched from Overpass (identifying UA, 25s query) and cached 24h per
+    quantized bbox. Markers are ``{id, name, lat, lon, type, extra}``.
+    """
+    if not bbox:
+        raise HTTPException(400, "bbox required (minlon,minlat,maxlon,maxlat)")
+    requested = [t.strip() for t in (types or "").split(",") if t.strip()]
+    if not requested:
+        raise HTTPException(422, "types required (e.g. nuclear)")
+    unknown = [t for t in requested if t not in _INFRA_TYPES]
+    if unknown:
+        raise HTTPException(
+            422, f"unsupported types: {', '.join(unknown)} (supported: nuclear)"
+        )
+    try:
+        markers = await fetch_infrastructure(",".join(requested), bbox)
+    except ValueError as exc:
+        raise HTTPException(422, str(exc)) from exc
+    except Exception as exc:
+        _upstream_or_502(exc, "infrastructure")
+    return overlay_json(markers, 86400)
+
+
 @app.get("/api/map/times")
 async def map_layer_times(
     layer: str = Query(..., description="GIBS layer identifier, e.g. VIIRS_SNPP_CorrectedReflectance_TrueColor"),
diff --git a/app/place.py b/app/place.py
new file mode 100644
index 0000000..e1729ee
--- /dev/null
+++ b/app/place.py
@@ -0,0 +1,99 @@
+"""Nominatim reverse-geocode proxy for the map place dossier.
+
+Browser clients cannot set an identifying User-Agent, and Nominatim typically
+blocks CORS — so the HUD calls GET /api/place instead of talking to OSM
+directly. Cache 60s / 500 keys; never exceed 1 req/s upstream.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import time
+
+import httpx
+from cachetools import TTLCache
+
+from config import NOMINATIM_MIN_INTERVAL, NOMINATIM_URL, OSINT_USER_AGENT
+
+_NOMINATIM = NOMINATIM_URL.rstrip("/")
+
+place_cache: TTLCache = TTLCache(maxsize=500, ttl=60)
+
+_lock = asyncio.Lock()
+_last_req = 0.0
+
+_ADDR_KEEP = (
+    "house_number", "road", "neighbourhood", "suburb", "city", "town",
+    "village", "hamlet", "county", "state", "postcode", "country", "country_code",
+)
+
+
+def cache_key(lat: float, lon: float) -> str:
+    return f"{lat:.4f},{lon:.4f}"
+
+
+def slim_place(lat: float, lon: float, data: dict | None) -> dict:
+    data = data or {}
+    raw_addr = data.get("address")
+    addr_in: dict = raw_addr if isinstance(raw_addr, dict) else {}
+    address = {k: addr_in[k] for k in _ADDR_KEEP if addr_in.get(k)}
+    err = data.get("error")
+    display = None if err else (data.get("display_name") or None)
+    name = None if err else (data.get("name") or address.get("city")
+                             or address.get("town") or address.get("village") or None)
+    return {
+        "lat": lat,
+        "lon": lon,
+        "display_name": display,
+        "name": name,
+        "address": address,
+        "osm_type": None if err else data.get("osm_type"),
+        "osm_id": None if err else data.get("osm_id"),
+        "attribution": "© OpenStreetMap contributors",
+    }
+
+
+async def reverse_geocode(lat: float, lon: float) -> dict:
+    """Reverse-geocode a point. Cache hits skip Nominatim entirely."""
+    if not (-90.0 <= lat <= 90.0 and -180.0 <= lon <= 180.0):
+        raise ValueError("lat/lon out of range")
+    key = cache_key(lat, lon)
+    qlat, qlon = (float(p) for p in key.split(","))
+    async with _lock:
+        hit = place_cache.get(key)
+        if hit is not None:
+            return hit
+        global _last_req
+        wait = _last_req + NOMINATIM_MIN_INTERVAL - time.monotonic()
+        if wait > 0:
+            await asyncio.sleep(wait)
+        body = await _fetch_nominatim(qlat, qlon)
+        _last_req = time.monotonic()
+        place_cache[key] = body
+        return body
+
+
+async def _fetch_nominatim(lat: float, lon: float) -> dict:
+    headers = {
+        "User-Agent": OSINT_USER_AGENT,
+        "Accept": "application/json",
+    }
+    url = f"{_NOMINATIM}/reverse"
+    params = {
+        "lat": f"{lat:.6f}",
+        "lon": f"{lon:.6f}",
+        "format": "jsonv2",
+        "addressdetails": "1",
+        "zoom": "18",
+    }
+    async with _http_client(timeout=10.0, follow_redirects=True) as client:
+        r = await client.get(url, params=params, headers=headers)
+        r.raise_for_status()
+        data = r.json()
+    if not isinstance(data, dict):
+        data = {}
+    return slim_place(lat, lon, data)
+
+
+def _http_client(**kwargs):
+    return httpx.AsyncClient(**kwargs)
diff --git a/app/static/index.html b/app/static/index.html
index 90f7470..e75f9bb 100644
--- a/app/static/index.html
+++ b/app/static/index.html
@@ -408,6 +408,54 @@
         .cheat-sheet dd { margin: 0; font-size: 0.78rem; color: var(--muted); }
         #swpc-chip { color: var(--text); letter-spacing: 0.08em; }
         #swpc-chip.swpc-storm { color: var(--amber); text-shadow: 0 0 8px rgba(255,180,84,0.45); }
+        /* ── Place dossier (“What’s here?”) ── */
+        #place-dossier {
+            position: absolute; top: 58px; right: 54px; z-index: 650;
+            width: 280px; max-height: calc(100% - 90px); overflow: hidden;
+            background: rgba(6,11,20,0.90); backdrop-filter: blur(8px);
+            border: 1px solid var(--line-hi); border-radius: 6px;
+            box-shadow: 0 0 22px rgba(53,224,255,0.14), 0 0 2px rgba(53,224,255,0.4);
+            color: var(--text); font-size: 0.78rem; display: none; flex-direction: column;
+            clip-path: polygon(0 8px, 8px 0, calc(100% - 8px) 0, 100% 8px, 100% calc(100% - 8px), calc(100% - 8px) 100%, 8px 100%, 0 calc(100% - 8px));
+        }
+        #place-dossier.open { display: flex; }
+        .pd-head {
+            display: flex; justify-content: space-between; align-items: center;
+            padding: 0.55rem 0.95rem 0.55rem 0.85rem; border-bottom: 1px solid var(--line);
+            font-family: 'Orbitron', sans-serif; font-size: 0.68rem; font-weight: 700;
+            letter-spacing: 0.14em; text-transform: uppercase; color: var(--cyan);
+            text-shadow: 0 0 10px rgba(53,224,255,0.55);
+            background: linear-gradient(180deg, rgba(53,224,255,0.07), transparent);
+        }
+        .pd-close {
+            background: transparent; border: 1px solid var(--line); color: var(--muted);
+            font-family: 'Share Tech Mono', monospace; font-size: 0.78rem;
+            width: 28px; height: 28px; border-radius: 4px; cursor: pointer; line-height: 1;
+            flex-shrink: 0; margin-right: 2px;
+        }
+        .pd-close:hover { border-color: var(--cyan); color: var(--cyan); }
+        .pd-body { padding: 0.55rem 0.75rem 0.7rem; overflow-y: auto; display: flex; flex-direction: column; gap: 0.55rem; min-height: 0; flex: 1; }
+        .pd-status { font-family: 'Share Tech Mono', monospace; font-size: 0.66rem; color: var(--muted); }
+        .pd-status.err { color: var(--red); }
+        .pd-coords { font-family: 'Share Tech Mono', monospace; font-size: 0.66rem; color: var(--cyan); letter-spacing: 0.04em; }
+        .pd-name { font-family: 'Rajdhani', sans-serif; font-weight: 700; font-size: 0.92rem; color: var(--text); line-height: 1.25; }
+        .pd-addr { font-size: 0.72rem; color: var(--muted); line-height: 1.4; }
+        .pd-sec {
+            font-family: 'Orbitron', sans-serif; font-size: 0.58rem; letter-spacing: 0.12em;
+            text-transform: uppercase; color: var(--muted); margin-top: 0.15rem;
+        }
+        .pd-list { display: flex; flex-direction: column; gap: 0.18rem; }
+        .pd-item {
+            display: flex; justify-content: space-between; align-items: baseline; gap: 0.5rem;
+            background: transparent; border: 0; border-left: 2px solid var(--line);
+            color: var(--text); text-align: left; cursor: pointer; padding: 0.22rem 0.35rem;
+            font-family: 'Rajdhani', sans-serif; font-size: 0.78rem; font-weight: 600;
+        }
+        .pd-item:hover, .pd-item:focus-visible { border-left-color: var(--cyan); color: var(--cyan); background: rgba(53,224,255,0.06); }
+        .pd-item .k { text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.58rem; color: var(--muted); font-family: 'Share Tech Mono', monospace; flex-shrink: 0; }
+        .pd-item .d { font-family: 'Share Tech Mono', monospace; font-size: 0.62rem; color: var(--cyan); white-space: nowrap; }
+        .pd-empty { font-size: 0.72rem; color: var(--muted); font-style: italic; }
+        .pd-note { font-size: 0.6rem; color: var(--muted); opacity: 0.85; line-height: 1.35; }
 
         /* ── Camera / blip popup thumbnails ── */
         .cam-pop { min-width: 210px; max-width: 260px; }
@@ -744,6 +792,14 @@
                 margin-top: 8px;
                 margin-right: 8px;
             }
+            #place-dossier {
+                top: auto;
+                right: 8px;
+                left: 8px;
+                bottom: 56px;
+                width: auto;
+                max-height: 36vh;
+            }
         }
         @media (prefers-reduced-motion: reduce) {
             .tick-track { animation: none; }
@@ -1002,6 +1058,21 @@
                     </div>
                 </div>
 
+                <aside id="place-dossier" role="dialog" aria-labelledby="pd-title" aria-hidden="true">
+                    <div class="pd-head">
+                        <span id="pd-title">What’s here?</span>
+                        <button type="button" class="pd-close" id="pd-close" aria-label="Close place dossier">✕</button>
+                    </div>
+                    <div class="pd-body">
+                        <div class="pd-status" id="pd-status">Right-click the map (long-press on touch).</div>
+                        <div class="pd-coords" id="pd-coords"></div>
+                        <div class="pd-name" id="pd-name"></div>
+                        <div class="pd-addr" id="pd-addr"></div>
+                        <div class="pd-sec">Nearby · 5 km</div>
+                        <div class="pd-list" id="pd-nearby"></div>
+                        <div class="pd-note">Loaded overlays only — no world refetch. Nominatim reverse via GET /api/place.</div>
+                    </div>
+                </aside>
                 <div class="map-hint" id="map-hint">Initializing…</div>
                 <div class="hud-chips" id="hud-chips">
                     <div class="hud-chip" id="hud-fires"><span class="c fires"></span>FIRMS <b id="hud-fires-n">—</b></div>
@@ -2158,6 +2229,8 @@ let lastVesselSubBox = '';      // last viewport box sent to the AIS stream
 let chokepointCatalog = [];     // GET /api/map/chokepoints, fetched once
 let vesselSrcPref = '';         // 'vesselapi' only on Hormuz preset — no extra polls
 let vesselRefollowTimer = null; // one follow-up fetch after a retune
+let lastCams = [], lastFires = [], lastAircraft = [], lastVessels = [], lastAlerts = [];
+let placeMarker = null, placeReq = 0, placeLongPress = null;
 function bboxCell() {
     if (!map) return '';
     return currentBBox().split(',').map(n => Number(n).toFixed(2)).join(',') + '@' + map.getZoom();
@@ -2381,6 +2454,17 @@ async function initMap() {
         map.on('popupclose', () => { camPopupOpen = false; });
         map.on('zoomstart', () => { if (camPopupOpen) map.closePopup(); });
         map.on('dragstart', () => { if (camPopupOpen) map.closePopup(); });
+        map.on('contextmenu', (e) => {
+            if (e.originalEvent) e.originalEvent.preventDefault();
+            if (typeof gfDrawOn !== 'undefined' && gfDrawOn) return;
+            openPlaceDossier(e.latlng);
+        });
+        bindPlaceLongPress(map);
+        const pdClose = document.getElementById('pd-close');
+        if (pdClose) pdClose.addEventListener('click', closePlaceDossier);
+        document.addEventListener('keydown', (ev) => {
+            if (ev.key === 'Escape') closePlaceDossier();
+        });
         map.on('moveend', () => {
             if (camPopupOpen) return; // only the popup's own autopan now
             if (moveDebounce) clearTimeout(moveDebounce);
@@ -2777,7 +2861,7 @@ function sinceToISO(sel) {
 async function toggleFires() {
     firesOn = document.getElementById('lp-fires-on').checked;
     if (firesOn) await loadFires();
-    else if (firesHeat) { map.removeLayer(firesHeat); firesHeat = null; }
+    else if (firesHeat) { map.removeLayer(firesHeat); firesHeat = null; lastFires = []; }
     hudFiresCount = null;
     syncHud();
 }
@@ -2807,6 +2891,7 @@ async function loadFires() {
         if (req !== fireReq) return; // superseded by a newer pan/zoom
         if (firesHeat) map.removeLayer(firesHeat);
         const pts = fires.map(f => [f.lat ?? f.latitude, f.lon ?? f.longitude, firesIntensity(f)]);
+        lastFires = Array.isArray(fires) ? fires : [];
         firesHeat = L.heatLayer(pts, {
             radius: 22, blur: 20, maxZoom: 9, max: 1.0, minOpacity: 0.2,
             gradient: firesGradient(),
@@ -2829,7 +2914,7 @@ async function loadFires() {
 async function toggleCams() {
     camsOn = document.getElementById('lp-cams-on').checked;
     if (camsOn) await loadCams();
-    else if (camsGroup) { map.removeLayer(camsGroup); camsGroup = null; }
+    else if (camsGroup) { map.removeLayer(camsGroup); camsGroup = null; lastCams = []; }
     hudCamsCount = null;
     syncHud();
 }
@@ -2907,6 +2992,7 @@ async function loadCams() {
     if (!map) return;
     if (tooZoomedOut()) {
         camsGroup = dropLayer(camsGroup);
+        lastCams = [];
         markZoom('lp-cams-count');
         hudCamsCount = null;
         syncHud();
@@ -2917,6 +3003,7 @@ async function loadCams() {
         const r = await overlayFetch(`${API}/api/cameras?bbox=${currentBBox()}&limit=2000`);
         const cams = await r.json();
         if (req !== camReq) return; // superseded by a newer pan/zoom
+        lastCams = Array.isArray(cams) ? cams : [];
         if (camsGroup) map.removeLayer(camsGroup);
         // Clustered markers: camera coverage stays visible as numbered
         // clusters at every zoom instead of vanishing into a sparse/empty
@@ -3505,12 +3592,13 @@ function loadThermal() {
 async function toggleWxAlerts() {
     wxAlertsOn = document.getElementById('lp-alerts-on').checked;
     if (wxAlertsOn) await loadWxAlerts();
-    else wxAlertsGroup = dropLayer(wxAlertsGroup);
+    else { wxAlertsGroup = dropLayer(wxAlertsGroup); lastAlerts = []; }
 }
 async function loadWxAlerts() {
     if (!map) return;
     if (tooZoomedOut()) {
         wxAlertsGroup = dropLayer(wxAlertsGroup);
+        lastAlerts = [];
         markZoom('lp-alerts-count');
         return;
     }
@@ -3521,6 +3609,7 @@ async function loadWxAlerts() {
         if (req !== overlayReq.alerts) return;
         wxAlertsGroup = dropLayer(wxAlertsGroup);
         const feats = fc.features || [];
+        lastAlerts = feats;
         wxAlertsGroup = L.geoJSON(fc, {
             renderer: L.canvas({ padding: 0.5 }),
             style: (f) => ({
@@ -3609,7 +3698,7 @@ async function loadIncidents() {
 async function toggleAircraft() {
     acOn = document.getElementById('lp-ac-on').checked;
     if (acOn) await loadAircraft();
-    else acGroup = dropLayer(acGroup);
+    else { acGroup = dropLayer(acGroup); lastAircraft = []; }
 }
 function toggleAircraftMil() {
     acMilOn = document.getElementById('lp-ac-mil-on').checked;
@@ -3629,6 +3718,7 @@ async function loadAircraft() {
         const all = Array.isArray(pts) ? pts : [];
         noteMilSupport(all);
         const shown = acMilOn ? all.filter(acVisible) : all;
+        lastAircraft = shown;
         acGroup = renderPoints(acGroup, shown, p => acColor(p), true, 'ac');
         setLayerCount('lp-ac-count', (shown.length || 0).toLocaleString());
         const milEl = document.getElementById('lp-ac-mil-count');
@@ -3673,6 +3763,7 @@ async function toggleVessels() {
         await loadVessels();
     } else {
         vesselsGroup = dropLayer(vesselsGroup);
+        lastVessels = [];
         clearTimeout(vesselRefollowTimer);
     }
 }
@@ -3707,7 +3798,8 @@ async function loadVessels() {
         const r = await overlayFetch(`${API}/api/vessels?bbox=${bb}${srcQs}${dvrQs()}`);
         const pts = await r.json();
         if (req !== overlayReq.vessels) return;
-        vesselsGroup = renderPoints(vesselsGroup, Array.isArray(pts) ? pts : [], p => {
+        lastVessels = Array.isArray(pts) ? pts : [];
+        vesselsGroup = renderPoints(vesselsGroup, lastVessels, p => {
             const extra = p.extra || {};
             if (extra.role === 'military') return '#f472b6';
             if (extra.role === 'government') return '#facc15';
@@ -3749,6 +3841,163 @@ async function loadStorms() {
     }
 }
 
+/* ── Place dossier (“What’s here?”) — Nominatim + already-loaded overlays ── */
+const PLACE_PAD_KM = 5;
+function haversineKm(aLat, aLon, bLat, bLon) {
+    const toRad = (d) => d * Math.PI / 180;
+    const dLat = toRad(bLat - aLat), dLon = toRad(bLon - aLon);
+    const a = Math.sin(dLat / 2) ** 2
+        + Math.cos(toRad(aLat)) * Math.cos(toRad(bLat)) * Math.sin(dLon / 2) ** 2;
+    return 2 * 6371 * Math.asin(Math.min(1, Math.sqrt(a)));
+}
+function placePt(p) {
+    const lat = p.lat ?? p.latitude;
+    const lon = p.lon ?? p.longitude;
+    if (lat == null || lon == null) return null;
+    return { lat: Number(lat), lon: Number(lon) };
+}
+function nearbyFromPoints(rows, origin, kind, labelFn) {
+    const out = [];
+    (rows || []).forEach((p) => {
+        const pt = placePt(p);
+        if (!pt) return;
+        const km = haversineKm(origin.lat, origin.lng, pt.lat, pt.lon);
+        if (km <= PLACE_PAD_KM) out.push({ kind, km, label: labelFn(p), lat: pt.lat, lon: pt.lon });
+    });
+    return out;
+}
+function alertCentroid(f) {
+    const g = f && f.geometry;
+    if (!g) return null;
+    let c = g.coordinates;
+    if (g.type === 'Point' && Array.isArray(c)) return { lat: c[1], lon: c[0] };
+    while (Array.isArray(c) && Array.isArray(c[0])) c = c[0];
+    if (Array.isArray(c) && typeof c[0] === 'number') return { lat: c[1], lon: c[0] };
+    return null;
+}
+function nearbyFromAlerts(feats, origin) {
+    const out = [];
+    (feats || []).forEach((f) => {
+        const p = f.properties || {};
+        const label = p.event || p.headline || 'Alert';
+        const pt = alertCentroid(f);
+        if (!pt) return;
+        const km = haversineKm(origin.lat, origin.lng, pt.lat, pt.lon);
+        if (km <= PLACE_PAD_KM) out.push({ kind: 'alert', km, label, lat: pt.lat, lon: pt.lon });
+    });
+    return out;
+}
+function collectNearby(origin) {
+    const items = [
+        ...nearbyFromPoints(lastCams, origin, 'camera', (p) => p.location_name || 'Camera'),
+        ...nearbyFromPoints(lastAircraft, origin, 'aircraft', (p) => p.label || (p.extra || {}).hex || 'Aircraft'),
+        ...nearbyFromPoints(lastVessels, origin, 'vessel', (p) => p.label || 'Vessel'),
+        ...nearbyFromPoints(lastFires, origin, 'fire', () => 'FIRMS hotspot'),
+        ...nearbyFromAlerts(lastAlerts, origin),
+    ];
+    items.sort((a, b) => a.km - b.km);
+    return items;
+}
+function renderNearby(origin) {
+    const box = document.getElementById('pd-nearby');
+    if (!box) return;
+    const items = collectNearby(origin);
+    if (!items.length) {
+        box.innerHTML = '<div class="pd-empty">No loaded cameras, aircraft, vessels, fires, or alerts within 5 km.</div>';
+        return;
+    }
+    const shown = items.slice(0, 24);
+    const more = items.length - shown.length;
+    box.innerHTML = shown.map((it) => {
+        const km = it.km < 1 ? `${Math.round(it.km * 1000)} m` : `${it.km.toFixed(1)} km`;
+        return `<button type="button" class="pd-item" data-lat="${it.lat}" data-lon="${it.lon}">`
+            + `<span><span class="k">${esc(it.kind)}</span> ${esc(it.label)}</span>`
+            + `<span class="d">${esc(km)}</span></button>`;
+    }).join('') + (more > 0 ? `<div class="pd-empty">+ ${more} more</div>` : '');
+    box.querySelectorAll('.pd-item').forEach((btn) => {
+        btn.addEventListener('click', () => {
+            const lat = Number(btn.dataset.lat), lon = Number(btn.dataset.lon);
+            if (!map || Number.isNaN(lat) || Number.isNaN(lon)) return;
+            map.setView([lat, lon], Math.max(map.getZoom(), 10));
+        });
+    });
+}
+function closePlaceDossier() {
+    const panel = document.getElementById('place-dossier');
+    if (panel) {
+        panel.classList.remove('open');
+        panel.setAttribute('aria-hidden', 'true');
+    }
+    if (placeMarker && map) { map.removeLayer(placeMarker); placeMarker = null; }
+}
+function bindPlaceLongPress(m) {
+    const el = m.getContainer();
+    const clear = () => {
+        if (placeLongPress) { clearTimeout(placeLongPress.timer); placeLongPress = null; }
+    };
+    el.addEventListener('touchstart', (ev) => {
+        if (ev.touches.length !== 1) { clear(); return; }
+        const t = ev.touches[0];
+        placeLongPress = {
+            x: t.clientX, y: t.clientY,
+            timer: setTimeout(() => {
+                const start = placeLongPress;
+                placeLongPress = null;
+                if (!start || gfDrawOn) return;
+                const latlng = m.mouseEventToLatLng({ clientX: start.x, clientY: start.y });
+                openPlaceDossier(latlng);
+            }, 550),
+        };
+    }, { passive: true });
+    el.addEventListener('touchmove', (ev) => {
+        if (!placeLongPress) return;
+        const t = ev.touches[0];
+        if (Math.hypot(t.clientX - placeLongPress.x, t.clientY - placeLongPress.y) > 14) clear();
+    }, { passive: true });
+    el.addEventListener('touchend', clear);
+    el.addEventListener('touchcancel', clear);
+    el.addEventListener('contextmenu', (ev) => ev.preventDefault());
+}
+async function openPlaceDossier(latlng) {
+    if (!latlng || !map) return;
+    const panel = document.getElementById('place-dossier');
+    const status = document.getElementById('pd-status');
+    const coords = document.getElementById('pd-coords');
+    const nameEl = document.getElementById('pd-name');
+    const addrEl = document.getElementById('pd-addr');
+    if (!panel) return;
+    panel.classList.add('open');
+    panel.setAttribute('aria-hidden', 'false');
+    const lat = latlng.lat, lon = latlng.lng;
+    if (coords) coords.textContent = `${lat.toFixed(5)}, ${lon.toFixed(5)}`;
+    if (nameEl) nameEl.textContent = '';
+    if (addrEl) addrEl.textContent = '';
+    if (status) { status.classList.remove('err'); status.textContent = 'Looking up place…'; }
+    if (placeMarker) map.removeLayer(placeMarker);
+    placeMarker = L.circleMarker([lat, lon], {
+        radius: 7, color: '#35e0ff', weight: 2, fillColor: '#35e0ff', fillOpacity: 0.25,
+        pane: 'markerPane',
+    }).addTo(map);
+    renderNearby(latlng);
+    const req = ++placeReq;
+    try {
+        const r = await fetch(`${API}/api/place?lat=${encodeURIComponent(lat)}&lon=${encodeURIComponent(lon)}`);
+        if (req !== placeReq) return;
+        if (!r.ok) throw new Error(`place ${r.status}`);
+        const d = await r.json();
+        if (req !== placeReq) return;
+        if (nameEl) nameEl.textContent = d.name || d.display_name || 'Unknown place';
+        if (addrEl) addrEl.textContent = d.display_name && d.name && d.display_name !== d.name
+            ? d.display_name : '';
+        if (status) status.textContent = d.display_name ? 'Nominatim · OSM' : 'No reverse geocode for this point';
+        const closeBtn = document.getElementById('pd-close');
+        if (closeBtn) closeBtn.focus();
+    } catch (e) {
+        if (req !== placeReq) return;
+        if (status) { status.classList.add('err'); status.textContent = 'Place lookup failed — nearby list is still from loaded overlays.'; }
+    }
+}
+
 function conflictSeverityColor(sev) {
     const s = String(sev || '').toLowerCase();
     if (s === 'war') return '#ff2a6d';
diff --git a/docker-compose.yml b/docker-compose.yml
index 76d0431..01abd37 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -138,6 +138,8 @@ services:
       FIRMS_DATASETS: ${FIRMS_DATASETS:-VIIRS_NOAA20_NRT,VIIRS_NOAA21_NRT}
       FIRMS_BBOX: ${FIRMS_BBOX:--180,-60,180,75}
       OSINT_USER_AGENT: ${OSINT_USER_AGENT:-osint-dashboard/1.0 (self-hosted; lancewalters94@gmail.com)}
+      NOMINATIM_URL: ${NOMINATIM_URL:-https://nominatim.openstreetmap.org}
+      NOMINATIM_MIN_INTERVAL: ${NOMINATIM_MIN_INTERVAL:-1.0}
       AISSTREAM_API_KEY: ${AISSTREAM_API_KEY:-}
       AISSTREAM_BBOX: ${AISSTREAM_BBOX:-24,-125,50,-66}
       AISSTREAM_IN_APP: ${AISSTREAM_IN_APP:-1}
diff --git a/tests/test_api_place.py b/tests/test_api_place.py
new file mode 100644
index 0000000..52e15ad
--- /dev/null
+++ b/tests/test_api_place.py
@@ -0,0 +1,127 @@
+"""GET /api/place — Nominatim reverse proxy (60s cache, 500 keys, 1 req/s)."""
+
+from __future__ import annotations
+
+import asyncio
+
+import httpx
+import pytest
+
+from main import app
+from place import cache_key, place_cache, slim_place
+
+BASE = "http://test"
+
+SAMPLE = {
+    "display_name": "Raleigh, Wake County, North Carolina, United States",
+    "name": "Raleigh",
+    "osm_type": "relation",
+    "osm_id": 123,
+    "address": {
+        "city": "Raleigh",
+        "state": "North Carolina",
+        "country": "United States",
+        "country_code": "us",
+        "tourism": "ignore-me",
+    },
+}
+
+
+class _FakeResp:
+    def __init__(self, payload, status=200):
+        self._payload = payload
+        self.status_code = status
+
+    def raise_for_status(self):
+        if self.status_code >= 400:
+            req = httpx.Request("GET", "https://nominatim.openstreetmap.org/reverse")
+            raise httpx.HTTPStatusError(
+                "upstream", request=req,
+                response=httpx.Response(self.status_code, request=req),
+            )
+
+    def json(self):
+        return self._payload
+
+
+class _FakeNominatim:
+    calls: list[dict] = []
+
+    def __init__(self, *args, **kwargs):
+        pass
+
+    async def __aenter__(self):
+        return self
+
+    async def __aexit__(self, *args):
+        return False
+
+    async def get(self, url, params=None, headers=None):
+        _FakeNominatim.calls.append({"url": url, "params": params, "headers": headers})
+        return _FakeResp(SAMPLE)
+
+
+def _nominatim_client(**kwargs):
+    return _FakeNominatim()
+
+
+async def _get(path: str) -> httpx.Response:
+    transport = httpx.ASGITransport(app=app)
+    async with httpx.AsyncClient(transport=transport, base_url=BASE) as client:
+        return await client.get(path)
+
+
+@pytest.fixture(autouse=True)
+def _reset_place(monkeypatch):
+    place_cache.clear()
+    _FakeNominatim.calls = []
+    monkeypatch.setattr("place._http_client", _nominatim_client)
+    monkeypatch.setattr("place.NOMINATIM_MIN_INTERVAL", 0.0)
+    monkeypatch.setattr("place._last_req", 0.0)
+    yield
+    place_cache.clear()
+
+
+def test_slim_place_keeps_address_subset():
+    body = slim_place(35.78, -78.64, SAMPLE)
+    assert body["display_name"].startswith("Raleigh")
+    assert body["name"] == "Raleigh"
+    assert body["address"]["city"] == "Raleigh"
+    assert "tourism" not in body["address"]
+    assert body["attribution"].startswith("© OpenStreetMap")
+
+
+def test_cache_key_quantizes_to_4_decimals():
+    assert cache_key(35.77961, -78.63821) == cache_key(35.77964, -78.63819)
+
+
+def test_place_requires_lat_lon():
+    resp = asyncio.run(_get("/api/place"))
+    assert resp.status_code == 422
+
+
+def test_place_rejects_out_of_range():
+    assert asyncio.run(_get("/api/place?lat=99&lon=0")).status_code == 422
+    assert asyncio.run(_get("/api/place?lat=0&lon=200")).status_code == 422
+
+
+def test_place_reverse_and_cache():
+    r1 = asyncio.run(_get("/api/place?lat=35.7796&lon=-78.6382"))
+    assert r1.status_code == 200
+    body = r1.json()
+    assert body["display_name"].startswith("Raleigh")
+    assert body["lat"] == pytest.approx(35.7796, abs=0.001)
+    assert "max-age=60" in (r1.headers.get("cache-control") or "").lower()
+    assert len(_FakeNominatim.calls) == 1
+    ua = _FakeNominatim.calls[0]["headers"]["User-Agent"]
+    assert "osint-dashboard" in ua.lower() or "@" in ua
+    r2 = asyncio.run(_get("/api/place?lat=35.77961&lon=-78.63821"))
+    assert r2.status_code == 200
+    assert len(_FakeNominatim.calls) == 1  # cache hit, same 4-decimal key
+
+
+def test_place_cache_cap_500():
+    from cachetools import TTLCache
+    assert isinstance(place_cache, TTLCache)
+    assert place_cache.maxsize == 500
+    assert place_cache.ttl == 60
diff --git a/tests/test_infrastructure.py b/tests/test_infrastructure.py
new file mode 100644
index 0000000..27dd80f
--- /dev/null
+++ b/tests/test_infrastructure.py
@@ -0,0 +1,145 @@
+"""GET /api/infrastructure — Overpass nuclear markers."""
+
+import asyncio
+
+import httpx
+
+from live_layers import (
+    normalize_infra_element,
+    overlay_catalog,
+    overpass_nuclear_to_markers,
+    _cache,
+)
+from main import app
+
+BASE = "http://test"
+
+OVERPASS = {
+    "version": 0.6,
+    "generator": "Overpass API",
+    "elements": [
+        {
+            "type": "node",
+            "id": 12345,
+            "lat": 44.0,
+            "lon": -1.5,
+            "tags": {"name": "Test NPP", "operator": "EDF", "plant:source": "nuclear"},
+        },
+        {
+            "type": "way",
+            "id": 67890,
+            "center": {"lat": 43.5, "lon": -1.25},
+            "tags": {"name": "Test Plant Way", "plant:source": "nuclear"},
+        },
+        {
+            "type": "relation",
+            "id": 999,
+            "center": {"lat": 43.0, "lon": -1.0},
+            "tags": {},
+        },
+    ],
+}
+
+
+async def _get(path: str) -> httpx.Response:
+    transport = httpx.ASGITransport(app=app)
+    async with httpx.AsyncClient(transport=transport, base_url=BASE) as client:
+        return await client.get(path)
+
+
+def test_normalize_node_to_marker():
+    m = normalize_infra_element(OVERPASS["elements"][0], "nuclear")
+    assert m["id"] == "node/12345"
+    assert m["name"] == "Test NPP"
+    assert m["lat"] == 44.0
+    assert m["lon"] == -1.5
+    assert m["type"] == "nuclear"
+    assert m["extra"]["operator"] == "EDF"
+    assert "name" not in m["extra"]
+
+
+def test_way_center_and_unnamed_fallback():
+    way = normalize_infra_element(OVERPASS["elements"][1], "nuclear")
+    assert way["lat"] == 43.5
+    assert way["lon"] == -1.25
+    rel = normalize_infra_element(OVERPASS["elements"][2], "nuclear")
+    assert rel["name"] == "relation/999"
+
+
+def test_overpass_json_to_markers():
+    markers = overpass_nuclear_to_markers(OVERPASS)
+    assert len(markers) == 3
+    assert markers[0]["id"] == "node/12345"
+
+
+def test_missing_bbox_400():
+    resp = asyncio.run(_get("/api/infrastructure?types=nuclear"))
+    assert resp.status_code == 400
+
+
+def test_unknown_type_422():
+    resp = asyncio.run(_get("/api/infrastructure?types=military&bbox=-2,43,-1,44"))
+    assert resp.status_code == 422
+
+
+def test_map_infrastructure_returns_markers(monkeypatch):
+    async def fake_fetch(types, bbox):
+        return [
+            {"id": "node/1", "name": "X", "lat": 1.0, "lon": 2.0,
+             "type": "nuclear", "extra": {}}
+        ]
+
+    monkeypatch.setattr("main.fetch_infrastructure", fake_fetch)
+    resp = asyncio.run(_get("/api/infrastructure?types=nuclear&bbox=-2,43,-1,44"))
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body[0]["name"] == "X"
+    assert body[0]["type"] == "nuclear"
+    assert "max-age" in (resp.headers.get("cache-control") or "").lower()
+
+
+def test_overlay_catalog_has_infra_nuclear():
+    entry = overlay_catalog()["infra_nuclear"]
+    assert entry["kind"] == "points"
+    assert "nuclear" in entry["endpoint"]
+
+
+def test_fetch_infrastructure_cache_hit_no_refetch(monkeypatch):
+    _cache.clear()
+    hits = {"n": 0}
+
+    class FakeResp:
+        def raise_for_status(self):
+            pass
+
+        def json(self):
+            return OVERPASS
+
+    class FakeClient:
+        def __init__(self, **kw):
+            pass
+
+        async def __aenter__(self):
+            return self
+
+        async def __aexit__(self, *exc):
+            return False
+
+        async def post(self, url, data=None, timeout=None):
+            hits["n"] += 1
+            assert "overpass-api.de" in url
+            assert "plant:source" in data["data"]
+            assert "nuclear" in data["data"]
+            return FakeResp()
+
+    monkeypatch.setattr("live_layers.httpx.AsyncClient", FakeClient)
+    monkeypatch.setattr("live_layers._http", None)
+
+    from live_layers import fetch_infrastructure
+
+    m1 = asyncio.run(fetch_infrastructure("nuclear", "-2,43,-1,44"))
+    m2 = asyncio.run(fetch_infrastructure("nuclear", "-2,43,-1,44"))
+    assert len(m1) == 3
+    assert m2 == m1
+    assert hits["n"] == 1
+    _cache.clear()
diff --git a/tests/test_live_layers.py b/tests/test_live_layers.py
index 32b57ad..9b31f71 100644
--- a/tests/test_live_layers.py
+++ b/tests/test_live_layers.py
@@ -27,7 +27,7 @@ from live_layers import (
     _wfigs_params,
 )
 
-from camera_scraper import parse_caltrans_json, parse_odot_json, parse_mdot_json
+from camera_scraper import parse_caltrans_json, parse_udot_ibi_page, parse_odot_json, parse_mdot_json
 
 
 def test_parse_bbox_and_radius_clamps_to_150_nm():
@@ -259,6 +259,83 @@ def test_parse_caltrans_skips_oos_and_maps_jpeg_hls():
     assert "rtsp://" not in cam["snapshot_url"].lower()
 
 
+# ── UDOT IBI 511 parser ──────────────────────────────────────────────────
+
+def _udot_row(cam_id, lng, lat, **img_overrides):
+    img = {
+        "id": cam_id, "cameraSiteId": cam_id,
+        "imageUrl": f"/map/Cctv/{cam_id}", "disabled": False, "blocked": False,
+    }
+    img.update(img_overrides)
+    return {
+        "id": cam_id, "sourceId": "102771", "source": "ADX",
+        "roadway": "Unknown", "direction": "Unknown",
+        "location": "Freedom Blvd / 200 W @ 1100 N, PVO",
+        "latLng": {"geography": {
+            "coordinateSystemId": 4326,
+            "wellKnownText": f"POINT ({lng} {lat})"}},
+        "images": [img],
+    }
+
+
+def _udot_page(rows):
+    import json
+    return json.dumps({"draw": 0, "recordsTotal": len(rows),
+                       "recordsFiltered": len(rows), "data": rows})
+
+
+def test_parse_udot_wkt_maps_lng_lat():
+    cams = parse_udot_ibi_page(_udot_page([_udot_row(112731, -111.66204, 40.24863)]))
+    assert len(cams) == 1
+    cam = cams[0]
+    # WKT is `POINT (lng lat)` — order must not be swapped.
+    assert cam["location_lat"] == 40.24863
+    assert cam["location_lon"] == -111.66204
+    assert cam["discovery_source"] == "udot"
+    assert cam["vendor"] == "UDOT"
+    assert cam["source_url"] == "https://prod-ut.ibi511.com/map/Cctv/112731"
+    assert cam["snapshot_url"] == cam["source_url"]
+    assert "rtsp://" not in cam["source_url"].lower()
+    assert cam["raw"]["udot_id"] == 112731
+
+
+def test_parse_udot_skips_blocked_and_disabled():
+    rows = [
+        _udot_row(1, -111.0, 40.0),
+        _udot_row(2, -111.1, 40.1, blocked=True),
+        _udot_row(3, -111.2, 40.2, disabled=True),
+    ]
+    rows.append(_udot_row(4, -111.3, 40.3))
+    rows[3]["images"] = []  # no images → drop
+    cams = parse_udot_ibi_page(_udot_page(rows))
+    assert [c["raw"]["udot_id"] for c in cams] == [1]
+
+
+def test_parse_udot_drops_out_of_bbox():
+    rows = [
+        _udot_row(1, -111.0, 40.0),   # inside Utah
+        _udot_row(2, -100.0, 40.0),   # east of -108.9
+        _udot_row(3, -120.0, 40.0),   # west of -114.2
+        _udot_row(4, -111.0, 44.0),   # north of 42.1
+        _udot_row(5, -111.0, 30.0),   # south of 36.9
+    ]
+    cams = parse_udot_ibi_page(_udot_page(rows))
+    assert [c["raw"]["udot_id"] for c in cams] == [1]
+
+
+def test_parse_udot_bad_payload_returns_empty():
+    import json
+    assert parse_udot_ibi_page("not json") == []
+    assert parse_udot_ibi_page(json.dumps({"data": None})) == []
+    assert parse_udot_ibi_page(json.dumps({"data": "nope"})) == []
+
+
+def test_parse_udot_missing_wkt_skipped():
+    row = _udot_row(1, -111.0, 40.0)
+    row["latLng"] = {}
+    assert parse_udot_ibi_page(_udot_page([row])) == []
+
+
 def test_parse_odot_tripcheck_keeps_valid_skips_missing_and_oob():
     payload = """
     {"features":[
diff --git a/tests/test_place_dossier_frontend.py b/tests/test_place_dossier_frontend.py
new file mode 100644
index 0000000..6fc1fd8
--- /dev/null
+++ b/tests/test_place_dossier_frontend.py
@@ -0,0 +1,59 @@
+"""Right-click place dossier HUD contract."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parent.parent
+HTML = (ROOT / "app/static/index.html").read_text()
+
+
+def test_place_dossier_panel_markup():
+    assert 'id="place-dossier"' in HTML
+    assert "What’s here?" in HTML or "What's here?" in HTML
+    assert 'id="pd-nearby"' in HTML
+    assert 'id="pd-close"' in HTML
+    assert 'role="dialog"' in HTML
+
+
+def test_place_dossier_uses_backend_nominatim_proxy():
+    js = HTML.split("async function openPlaceDossier", 1)[1].split(
+        "/* ═══════════════ INITIAL LOAD", 1
+    )[0]
+    assert "/api/place?lat=" in js
+    assert "nominatim.openstreetmap.org" not in js
+    assert "/api/aircraft" not in js
+    assert "/api/vessels" not in js
+    assert "/api/cameras" not in js
+    assert "/api/fires" not in js
+    assert "/api/weather-alerts" not in js
+    assert "/api/infrastructure" not in js
+
+
+def test_place_dossier_scans_loaded_overlays_5km():
+    assert "const PLACE_PAD_KM = 5" in HTML
+    assert "function collectNearby" in HTML
+    assert "lastCams" in HTML
+    assert "lastAircraft" in HTML
+    assert "lastVessels" in HTML
+    assert "lastFires" in HTML
+    assert "lastAlerts" in HTML
+    assert "function haversineKm" in HTML
+
+
+def test_place_dossier_right_click_and_long_press():
+    assert "map.on('contextmenu'" in HTML
+    assert "function bindPlaceLongPress" in HTML
+    assert "function closePlaceDossier" in HTML
+    assert "Escape" in HTML.split("function initMap", 1)[1][:8000] or "Escape" in HTML.split(
+        "bindPlaceLongPress(map)", 1
+    )[0][-500:]
+
+
+def test_place_dossier_mobile_is_bottom_sheet():
+    mobile = HTML.split("@media (max-width: 820px)")[1].split(
+        "@media (prefers-reduced-motion"
+    )[0]
+    assert "#place-dossier" in mobile
+    assert "bottom: 56px" in mobile
+    assert "max-height: 36vh" in mobile