Fuente Cobre, source of the Pisuerga Nature · La Pernía, Montaña Palentina, Palencia Image of La Pernía, not of the place itself. The river Pisuerga springs from the cave of Fuente Cobre, at the head of the valley of La Pernía; the site gives its name to the eastern half of the natural park, whose other half is organised around the Fuentes Carrionas. Photo: Fabril68 (CC BY-SA 3.0) What to see and do in La Pernía