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The cave system consists of twisted, tangled stone formations and murky subterranean lakes that take hours to fully explore.
The Swiss location has become such a legendary draw, the caves are lit with eery lights and adorned with safe footpaths to make it safe and appealing for visitors. As a result, these strange and fascinating caverns have become something of a tourist attraction, with tours and guides readily available.
Know Before You Go
Opened from late March to late October each year. Closed over the winter months.