Retreating drone shot of a crsytal clear frozen lake's bubbling water, creating ripples and waves on its surface, located in Engelberg, Brunni, Bahnen in Switzerland

lake ripples waves frozen lake water bubbles alps alpine winter engelberg brunni bahnen destination tourism mountains snowy glacier clouds via ferrata eldorado tours hiking trails hikers lake harzlisee mountaineering idyllic sledging snowboard winter hiking snowshoeing paragliding night skiing tourist spot adventures outdoors nature trails klostermatte globis winterland jagged cliffs pine trees ecotourism leisure recreation skiing