Avenc de les Dues Boques

Going along the track that from the Campgràs follows the rubbish dump, once past the col that forms at the head of the fondo de l'Infern, take a path on the right marked with cairns (itinerary to go to the avenc de la Sivinota) following the ridge. At first this is flat, shortly afterwards the slope steepens and later becomes flat again. At this point head towards the Bassot de l'Arbre (210º), descending the left slope of the fondo de l'Infern for about 75 metres, until reaching the mouths of the pit, which are about 25 metres above the streambed.