These are the two fortresses closest to each other in the whole of Spain. Both have been declared Assets of Cultural Interest. The Castillo de Arguijuelas de Abajo was built in the 15th century by Francisco Ovando the Elder with a walled enclosure, defensive towers, and a beautiful garden. It is now used as a setting for celebrations. The Castillo de Arguijuelas de Arriba was subsequently built in the 16th century, also by the Ovando family, on a slightly higher hillock. It is also battlemented with four towers, one of which is prismatic. Both castles are in a very good state of repair.