Dovecote Towers of Montferrer Monument · Montferrer i Castellbò, Alt Urgell, Lleida Three Romanesque dovecote towers popularly known as the colomer de cal Gració, that of Tema, and that of Paraire, situated at the edges of the village of Castellbò, within the municipality. Square in plan, of rough stone bonded with mud, with the interior full of small nesting cells for raising pigeons; a medieval origin is attributed to them, though without documentation to confirm it. A Bien Cultural de Interés Nacional (Catalonia's top heritage-protection category). Photo: Ermengol Patalín (CC BY-SA 3.0) What to see and do in Montferrer i Castellbò