The first part of the walk begins peacefully and connects the beautiful Fairy Valley with the romantic and unspoilt valley of the Martin-Moulin. The way back follows a winding path dotted with roots and stones. Here and there you have to rely on naked rocks and crossing brooks from one stone to another. You see an old beaver dam at a certain location. Also otters can be found in this valley. In the second part you leave the valley and you go up into the height, where you get a nice view of Achouffe. A little later the course becomes rough and adventurous. A path leads to two viewpoints to descend to the depths of the valley of the Martin-Moulin, where you start on your way back. Tip: A visit to the Achouffe brewery.