Altenstein cave

"Altenstein Cave" is located in Schweina and is the oldest tourist cave in Thuringia. The cave was discovered in 1799 during the building of the road to Castle Altenstein. This karst cave was formed among the Upper Permian (Zechstein) calcifying algae reefs. Since 2019 the "Reef Complex of Altenstein" is a National Geotope.


Altenstein Cave

Altensteiner Str. 5

36448 Schweina
Telephone: 036961 69320


Guided tours are available every Thursday and Sunday at 10:00 am and 2:00 pm.

A schedule of concerts, special tours and lectures is found at

Please call before you visit to confirm the regular tour schedule!