The Hölloch is a 200.4 km long cave in the municipality Muotathal in Switzerland. In addition to being the second longest cave in Europe, it is also notable for having a depth of 938.6 m . The Hölloch is an example of a karst cave system.
The cave was first scientifically explored in 1875 by a group led by Alois Ulrich. Later expeditions in the 1950s by Alfred Bögli, one of the pioneers of speleology, managed to explore a large part of the cave.
Source: Wikipedia.org
Copyright: Creative Commons 3.0
Schwyz, Switzerland
Discover the most beautiful and popular trails in the area, carefully bundled into appropriate selections.
Source: Eric Gaba (Sting - fr:Sting) and NordNordWest
Copyright: Creative Commons 3.0
Discover the most beautiful and popular attractions in the area, carefully bundled in appropriate selections.
Source: Eric Gaba (Sting - fr:Sting) and NordNordWest
Copyright: Creative Commons 3.0
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