In the heart of the forest, on the heights of Wattwiller and at the foot of the Hartmannswillerkopf - Le Vieil-Armand, climb along the stream and admire the Siehlbaechle waterfall from the footbridge. The "Siehlbaechle" originates from the slopes of the Molkenrain (name of the summit - Route des Crêtes in the direction of the Grand Ballon) and has a torrential regime punctuated by waterfalls. It crosses the village and leads to the Grandes Sources de Wattwiller bottling plant (extract from the commune of Wattwiller).