It is impressive: a waterjet spews forth from the rock 305 meters high. The water of the Rinquelle originates in a huge cave system deep in the Churfirsten. Divers have been investigating it since the beginning of the 20th century. It is evident that there is a 3-km-long canal that leads somewhere deep into the bowels of the mountain. What happens then, however, is still a mystery.

How to get there:
Drive or take public transportation from Zürich via Ziegelbrücke near Betlis on Lake Walen (boat from Weesen)