St. Beatus Caves
Sundlauenen, Lake Thun, Switzerland
St. Beatus Caves lead into the limestone of the Niederhorn massif above Lake Thun. The visitor route extends about a kilometre through illuminated passages, grottos and underground waterfalls, with information explaining the geology along the way. Outside, the cliffside setting and water flowing towards the lake provide a striking contrast to the enclosed chambers. Allow around an hour for the cave walk itself and wear warm clothing and shoes suited to damp steps.