Hike along the "Chessibidmer" alpine moor and beside the Räterichsboden dam down to Gerstenegg. Picknick underway. Ride on mountain bikes through the tunnel system to the Grimsel II power plant and the crystal cavern.
Duration: approx. 5 hrs
For the real live wires: add the excitement of abseiling in or on the Räterichsboden dam.
Duration: approx. 6,0 hrs