El Rosario district (Sinaloa)

Where: Sinaloa · North America · approx. 22.99, -105.86 (vicinity only)

Why this spot: Bonanza silver-gold veins beneath the town, mined from 1655 until tunnels undermined the church

What turns up: quartz, silver-gold ore traces

Access: Permission required.

Workings run under private town land, no open collecting, ask about dumps.

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.