The medieval tower of Layna Monument · Arcos de Jalón, Tierra de Medinaceli, Soria Image of Arcos de Jalón, not of the place itself. At 1,151 metres of altitude, this hamlet on the Camino del Cid preserves a medieval tower protected as a heritage asset, a remnant of the fortifications that watched the heights between the Jalón and the Duero. Photo: Luis Rogelio HM (CC BY-SA 2.0) What to see and do in Arcos de Jalón