Italy
Zvezdel Mine was a gold and silver mine in the Rhodope Mountains of southern Bulgaria, protected by the Asara Fortress, which saw construction between the 9th and 11th centuries. The mine is located approximately a 5.1 km drive south from the village of Zvezdel via Route 59 on to Route 5902.
Listen to the audio guide for Zvezdel Mine Free on WIP — starts by itself when you arrive, even with the screen off