The Sarca stream dives into a narrow gorge at the entrance to the Siniciàga and Germénega valleys.
The Casol waterfall descends on the right bank of the Sarca, collecting the waters of the Seniciaga and Germenega valleys. Take the SAT path 215 from the bottom of the valley and walk towards the Germenega Hut. Climbing quite a steep path, you reach a spot from which you can admire the waterfall set in an evocative environment.