crevasses, gorner glacier during summer

alpine alpinism alpinist alpinists alps area castor countryside crevasse crevasses during geography glacial glacier glaciers glaciology gorner gornergletscher grenzgletscher high hike hiker hikers hikes hiking ice icy landscape liskamm lyskamm melting mountain mountaineer mountaineering mountaineers mountainous mountains natural nature peak pennine point pollux region regions sceneries scenery scenic seracs summer swiss switzerland top valais valaisan wallis zermatt zwillinge