Hillforts of El Castillo and El Castro Nature · Ardón, El Páramo, León Image of Ardón, not of the place itself. Two fortified settlements on a knoll above the escarpment of the Esla. The first was occupied in the Late Bronze Age and the Iron Age and reoccupied in the early and high Middle Ages; the second only in the Late Bronze Age. Photo: Hovallef (CC BY-SA 4.0) What to see and do in Ardón