ice field on the great aletsch glacier

aletsch alpine alps area areas bernese countryside crevasse europe field front glacial glacier glaciers glaciology great grindelwald heritage high ice jungfrau jungfraualetsch jungfraualetschbietschhorn jungfraufirn jungfraujoch konkordiaplatz landscape mountain mountainous mountains natural nature oberland region regions sceneries scenery scenic site swiss switzerland top unesco world