Where: Spain · Europe · approx. 38.77, -4.83 (vicinity only)
Why this spot: Silurian to Devonian
What turns up: Red cinnabar with quartz and native mercury from the world's greatest mercury district (now a mining-heritage park)
Access: Permission required.
The mines are a UNESCO mining park and museum; collecting is via the park, independent access is prohibited and mercury is toxic.
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.