Glacial lake with floating ice and rocky mountains in Klausenpass, Urner Boden, Switzerland

glacial lake floating ice rocky mountains klausenpass urnerboden switzerland aerial nature scenic water cold pristine remote serene wilderness natural beauty outdoors environment dramatic high altitude travel exploration picturesque alpine rugged landscape peaceful tranquil untouched summer seasonal climate erosion geological ice floes clear water glacier reflection majestic cliffs breathtaking swiss alps snow capped europe european alps swiss