If brooks and rivers run only sluggishly above ground, hydropower is nearly impossible to harness. That is why the inhabitants of the valley of Le Locle began to use subterranean streams. This is how the cave mills of "Col-des-Roches" arose.
Guarda in the Lower Engadine is so beautiful a village that it was awarded the Wakker Prize. It also received the distinction "Of national importance". One of its stately houses inspired Alois Carigiet when he drew the home of Schellenursli.
Erosion caused the mountain to collapse and the vast, pale yellow and reddish rock basin to form, which becomes bigger every year. From the Grabenrad or the Illhorn (2,716 m) there are "fear inspiring" yet stunning views down into the Rhone valley.
15 kilometres of meditative hiking pleasure and one of Switzerland's most beautiful "water trails" run between Soubey and St-Ursanne.