Castle of los Duques del Infantado Monument · Saldaña, Vega-Valdavia, Palencia A medieval fortress, today in ruins, that dominates the floodplain of the Carrión from the hill above the town; it belonged to the house of the Marquis of Santillana, when Saldaña was the head of more than a hundred places. Photo: Valdavia (CC BY-SA 3.0) What to see and do in Saldaña