the first early autumn snow on the high alpine peaks above the calfeisental alpine valley and in the unesco world heritage

alpine alps arena attraction autumn background beautiful bridge calfeisental change climate cold covered destination early europe extreme first global heritage high hiking holiday ice journey landscape mountain mountains nature outdoor outdoors panorama panoramic peak peaks range rock sardona scenery scenic schweiz season ski sky slope snow sport station summer summit suspension swiss switzerland tectonic tektonikarena top tourism travel trip unesco unescowelterbe vacation valley view voyage walk warming weather winter world