The 300 sq. kilometer area around the Piz Sardona shows the geological phenomenon of overlay - older rock strata are to be found above younger ones. They bear witness to the formation of mountains and to plate tectonics.
Lake Oeschinen, which lies above Kandersteg, is a pristine mountain lake, fed by the glacial brooks of the three-thousand-meter peaks of Blüemlisalp, Oeschinenhorn, Fründenhorn and Doldenhorn. People who love to swim, nature lovers and hikers can really enjoy themselves here.
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.
The photovoltaic solar power station operates on Mount Soleil. Wind turbines stand on Mount Crosin.