mountain climber heading up a steep hanging glaicer around seracs in the alps of switzerland

active activity alps around ascend bellavista bernina climb climber climbers climbing crampons crevasse danger engadin engiadina exposed face glacier glaicer grisons guide hanging heading horizontal ice icy lead male man moritz morteratsch mountain mountaineering near north one palu peak piz pontresina risk rope route serac seracs snow sports steep swiss switzerland white