Festivities of Urrea de Jalón Activity · Urrea de Jalón, Valdejalón, Zaragoza Image of Urrea de Jalón, not of the place itself. Urrea de Jalón honours San Sebastián on 20 January. Reconquered in the 12th century, by 1326 it already belonged to the house of Ximénez de Urrea, which would later obtain the title of counts of Aranda. Photo: Ecelan (CC BY-SA 3.0) What to see and do in Urrea de Jalón