Church of San Bernabé de Arenas de San Juan Monument · Arenas de San Juan, La Mancha, Ciudad Real A Romanesque-Mudéjar church declared a National Historic Monument, an exceptional style at this latitude of the peninsula. The building was successively a Roman watchtower beside the road, a mosque and a church, and its restoration brought valuable frescoes to light. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in Arenas de San Juan