"D'Sibe Brünne" - the source of the Simme, which gives the valley its name, lies on the Rezliberg above Lenk, right at the foot of a mighty limestone wall. This is where the Simme emerges white-foaming. In summer, up to 2,800 liters per second flow over the seven springs. The "Sibe Brünne", a magical waterfall, is a proven source of power and a wonderful place to linger.

The Simme spring (Sibe Brünne, Siebenbrunnen, Siebenbrünnen or Simmenquelle) with seven main branches gushes out of a mighty limestone wall and is fed by seeping meltwater from the high mountains of the glacier between Wildstrubel and Rohrbachstein. The water gushes forth from seven springs on the Rezliberg alp as a 30-metre-wide fan of rock crevices. The Simme flows into the Kander at Wimmis, after a good 50 kilometers through the Simmental. This in turn flows into Lake Thun. From "Sibe Brünne" (seven fountains) came the name Sibne and later Simme, for the river and the Simmental of the same name. Below the Rezliberg Alp, the Simme becomes the 200-metre-high Simmen Falls. The water develops a special power here. Masses of water cascade over rocks and envelop the surrounding area in water mist. From the Simmen Falls restaurant, a wide path leads up to the Barbara Bridge, from where you have a good view of the cascading water. The Barbara Bridge, where the spray splashes in your face and you can almost touch the waterfall. The Barbara Bridge, or rather the dam in front of the waterfall, is a weir for diverting the young Simme. This measure to protect the valley floor from flooding was taken as early as the late 18th century. Barbara was the first name of the wife of the then director of the Kurhaus, who initiated the development of the Simmen Falls and the weir for tourists. The "Sibe Brünne", the Barbara Bridge and the Simmen Falls are located at the far end of the valley, five kilometers behind the village of Lenk.