Canyoning · Interlaken, Bernese OberlandCanyoning, Saxeten GorgeADVANCEDRisk: HIGHCHF ~120–180Switzerland effectively invented commercial canyoning tourism here in the 1990s — abseiling, sliding and jumping down a water-carved gorge. It's also the site of the 1999 Saxeten flash-flood disaster that killed 21 canyoners from a single tour group; operators now run under much stricter weather protocols, but the risk is real and weather-dependent, not theoretical.View details