Avenc de Fontanilles

About 450 metres east of the Espina farmhouse, right next to a cultivated field. Going up the road from Tona to Collsuspina, shortly before reaching the coll de la Pollosa, an important track comes out on the left. We will follow it for half a kilometre to the house of the Collada, where we will leave it to take another secondary track on the right. About a kilometre later, we reach the coll d’Heures, where we will leave the car. From here we will take a new track heading west, which we will follow for not quite 100 metres before leaving it and continuing cross-country heading north until we find the cultivated field on the eastern side of which the entrance is located, next to a small tree. From the car to the cavity, about 5 minutes.