Castle of Magaz Monument · Magaz de Pisuerga, El Cerrato, Palencia Image of Magaz de Pisuerga, not of the place itself. A fortress built on the hill above the town at the end of the eleventh century, later handed over by Queen Urraca to the bishop of Palencia; Roman and Celtic ceramics have appeared in the caves of the hillside. Photo: Valdavia (CC BY-SA 3.0) What to see and do in Magaz de Pisuerga