Mudéjar Tower of San Martín del Río Monument · San Martín del Río, Jiloca, Teruel The tower of the church of San Martín obispo, on the main square, has a Gothic, square, rubble-masonry lower section, topped by four octagonal brick sections built between 1600 and 1606, with buttresses at every corner and relief Mudejar decoration. It is one of the great towers of late Teruel Mudejar work and was declared a Bien de Interés Cultural (Property of Cultural Interest, Spain's top heritage-protection category since the 1985 Heritage Law) in December 2001, but it is not on the World Heritage list. Photo: Viquipèdia / Wikimedia Commons (CC BY-SA) What to see and do in San Martín del Río