Extreme skier descends into glacier cave in Switzerland

Quelle: KAMERAONE ENGLISH (Glomex)

An extreme skier in Zermatt, Switzerland discovers a glacier cave on April 6 and heads inside. Glacier caves are formed by the presence of a heat source beneath the ice, usually a volcanic vent or a hot spring. The caves are highly dangerous and unstable, prone to shifting from the movement of the glacier or complete collapse.