The Curavacas above the Vidrieros valley Nature · Triollo, Montaña Palentina, Palencia At 2,525 metres, the Curavacas is the highest summit of the Montaña Palentina; its pyramid of conglomerate rises above the Vidrieros valley and is the most demanding ascent in the natural park. Photo: Alejandro Polanco (CC BY 3.0) What to see and do in Triollo