Glacial landscape with a meltwater lake at Klausenpass, Urner Boden, Switzerland

glacial landscape meltwater lake klausenpass urnerboden switzerland aerial nature scenic ice snow rocks rugged remote mountains serene wilderness natural beauty outdoors environment dramatic high altitude travel exploration picturesque alpine cold pristine panoramic breathtaking terrain geography peaceful tranquil untouched valley summer seasonal climate erosion geological glacial lake rugged landscape swiss alps swiss europe european