Torres carlistas y puentes romanos de Iruña de Oca Monument · Iruña Oka/Iruña de Oca, Cuadrilla de Añana, Álava Image of Iruña Oka/Iruña de Oca, not of the place itself. Three 19th-century defensive towers built during the Carlist Wars (Vayagüen, El Encinal, Almoreta), the ruins of the monastery of Santa Catalina (14th century), and the Roman bridges of Trespuentes and Víllodas. siglo XIX Photo: Basotxerri (CC BY-SA 4.0) What to see and do in Iruña Oka/Iruña de Oca