Crystal Cavern Gerstenegg

The unique crystal cavern Gerstenegg is approximately 1,5 km in the interior of the Grimsel massif and it is the only cavern in the Alps accessible in its original form. It was discovered in 1974 during the KWO power plant construction. The cavern can be visited as part of a power plant tour. The guided tour is recommended for young people aged above 11 years.