Picu Urriellu Nature · Cabrales, Oriente, Asturias Also known as the Naranjo de Bulnes, this limestone monolith of the central massif reaches 2,519 metres and presents on its west side a vertical wall of some 550 metres; Pedro Pidal and the shepherd Gregorio Pérez reached its summit in 1904. Photo: Evölah (CC BY-SA 3.0) What to see and do in Cabrales