Walls of Coll de Nargó Monument · Coll de Nargó, Alt Urgell, Lleida The old core of Coll de Nargó, raised on rock, was a walled village in which the houses themselves formed the wall; remains of the wall survive along with the springing of an arch from one of the gates that closed off the medieval town. Photo: MARIA ROSA FERRE ✿ (CC BY-SA 2.0) What to see and do in Coll de Nargó