The Soldadesca of Iruecha Activity · Arcos de Jalón, Tierra de Medinaceli, Soria Image of Arcos de Jalón, not of the place itself. On the second-to-last Saturday of August the only Moors and Christians battle of Castilla y León is performed in Iruecha, declared a Festival of Regional Tourist Interest in 1991 and sustained by a village of barely five residents. Photo: Luis Rogelio HM (CC BY-SA 2.0) What to see and do in Arcos de Jalón