Torca Urriellu

The Torca de Urriellu is a large cave with a great chasm 1,017 m. deep. Its development clearly shows two clearly differentiated sectors: the vertical sector, formed by a series of shafts, meanders and narrows, and which ends in a siphon at a depth of 972 m., and the lower sector, formed by large galleries, one of which is a vast and very interesting fossil gallery.

A watercourse, called the River of Silence, flows through it, which joins at the terminal siphon at a depth of 1,017m.