Avenc de l'Esquena d'ases

Follow the riera de les Arenes in its upper stretch, between the sots de les Teixoneres and the sot de la Bóta. Continuing downstream, you will come upon a vertical step, heavily eroded, forming a couple of curious protruding slabs of rock. We will move to the left of the riera, skirting among the vegetation and the upper level of the step, until we find the cavity only 20 metres from the aforementioned step.