The National Folklore Festival of San José Obrero Activity · Cabezón de Pisuerga, Campiña del Pisuerga, Valladolid Image of Cabezón de Pisuerga, not of the place itself. On 1 May, with the feast of San José Obrero, the municipality hosts a folklore festival that brings together traditional dance groups from different regions in the square and around the bridge. Photo: Luis Rogelio HM (CC BY-SA 2.0) What to see and do in Cabezón de Pisuerga