The Erdmannshöhle is a stalactite or flowstone cave in the village Hasel between Schopfheim and Wehr, 20 km east of Lörrach in Baden-Württemberg in Germany.
Wikipedia https://en.wikipedia.org/wiki/Erdmanns_Cave
Official Website http://www.gemeinde-hasel.de/
Address Wehrer Straße, 79686, Germany
Coordinates 47°38'55.176" N 7°53'44.15" E