Tags: Cave.
The Barbarossa Cave (German: Barbarossahöhle) is an anhydrite cave (gypsum cave) in the Kyffhäuser Hills near Rottleben in the east German state of Thuringia. It is a cave with large caverns grottos and lakes. The anhydrite has formed gypsum on the surface due to the air moisture in the cave and as a result has increased in volume.
