Avenc del Fus

By the track that descends from the Sotarro towards the Pla del Marge del Moro, once past the turn-off of the track that descends on the left through the serra del Mas towards the Pla d'Ardenya, we will find a new turn-off: the one on the left leads to the avenc Marcel, one must follow the one on the right. When the track begins to descend after leaving another turn-off on the left, which also leads to the avenc Marcel, we will find on the left and at the foot of the path the elongated mouth of a minuscule pit; a few metres further on, on the right of the track and about 15 metres from it, is the cavity.