Aerial flyover through the crevasses of the Moiry glacier near Grimentz in Valais, Switzerland with a pan down view from the mountain peaks to the ice on a cloudy summer afternoon

glacier crevasse glacial moraine ice mountains alps mountaineering icy climate val danniviers frozen environment landscape swiss alps altitude cold climate change valais suisse aerial hike grimentz moiry climbing melting melt overcast swiss cloudy wallis nature hiking overhead switzerland 4k structure travel adventure alpine september zinal drone fall europe outdoors autumn summer fly