Castle of los Bazán Monument · Palacios de la Valduerna, La Bañeza, León A fortress of the 14th or 15th centuries raised on a height overlooking the Duerna valley, with four cubic towers on an irregular trapezoid of some six hundred square metres. It has been under state protection since the decree of 22 April 1949. Photo: Susana gonzalez (CC0) What to see and do in Palacios de la Valduerna