Lower Muschelkalk (Shell-bearing limestone) is the rock present in the cave.

Cave formation

The flow of naturally acidic water (for example, from the Ulmbach stream or from subterranean whirlpools) from the overhanging basalt rock caused the limestone to dissolve, giving rise to chambers such as the 'Cathedral', and also led to the formation of stalactites (hanging from the ceiling) and stalagmites (rising from the floor).

The cave is ca. 2½ million years old.

Geological significance

Due to its relatively large karst formation in the lower Muschelkalk, the cave represents an important geological natural monument.


The 'Cathedral' is the biggest cavern in the cave system. Its almost round form measures 11 metres in diameter and was originally 25 metres high. However, it now measures only 16 metres in height, as the rock has been further eroded away. The cave was first accessible via a natural chimney-like vent.


A cave measuring 8 metres in height and 5½ metres in width, with veil-like stalactites and stalagmites.


A stalagmite in the shape of a beehive.

AnfahrtTravel by car
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Please be aware that the following rules must be observed in the cave:

Helmpflicht A hard hat must be worn in the cave at all times.
Fotografierverbot Photography and filming are not permitted in the cave.
Tierverbot Pets (above all dogs) must be left outside the cave.
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