One of the most spirited and most spicy routes, on the massive mountain local to the town of Gruyères. It is a surprisingly logical North Wall route with perfect safety - à la française- and a few vertical and overhanging sections. There are also repeated sections of soil and grass, making the Voie Hohl (to give it its proper name) more suited to the high summer. The climb to the start point and the descent are steeply sloping, but have good safety. There is a charge for the Moléson via ferrata; 4 Swiss francs for adults, 2 Swiss francs for children; the money is used to maintain the via ferrata.