summer on the splgen in switzerland. ice floes on a lake in high mountains

summer splgen switzerland ice floes lake high mountains lake ice floe reservoir italy switzerland splügen splügen pass mountains mountain summer mountain water barren landscape peak glacier glacier cold graubünden chiavenna passo dello spluga thaw thawing environment environmental warming pass altitude fresh snow snow melt melting earth climate blue antarctica mountaineering sports nature outdoors outside frozen frozen scenery