the cave and the source hundsloch hundslochquelle or hundlochquelle by the alpine lake wagitalersee wägitalersee

alpine amazing ancient background beautiful beauty black blue bright canton cave caves contrast dark ecological environment europe extreme famous flame forest green grieving health hot hundlochquelle hundsloch hundslochquelle innerthal kanton lake landmark landscape light medieval moss mountain mystical natural nature outdoor reflection reflections river rock scenery scenic schweiz schwyz source speleology spring stone summer swiss switzerland tourism travel turquoise underground view waegitalersee wagitalersee