The crystal chamber was discovered in 1888; however, it has only been open to the public since 1897.
The reason for the extraordinary and unique formations of stalactites and stalagmites in the crystal chamber is the lacy calcite crystals that are heaped under the earth at this point. They form the strangest figures: some stalactite formations resemble a linden tree, a castle or a fountain. A very special crystal formation looks like the Great Wall of China.
Clearly visible water level marks can also be found in the crystal chamber. Just like horizontal lines they extend through the narrow corridor of the crystal chamber and offer an extraordinary sight. The unique calcite crystals were created here over thousands of years in stagnant water.