Utzenfeld, Italy
The Finstergrund Pit (German: Grube Finstergrund) near Wieden in the Black Forest in Germany is an abandoned medieval silver and lead mine that was also used in the modern era to extract fluorite and baryte. Since 1982 it has been used as a visitor mine.
Listen to the audio guide for Finstergrund Free on WIP — starts by itself when you arrive, even with the screen off