Since 1983 archaeologists at Carranque have been excavating what they believe to be the foundations of a late-4th-century Roman basilica , which would make it the oldest in Spain. The skeletal remains of Roman villas and temple-fountains are among the site's other highlights, while the remains of a 12th-century monastery with some valuable mosaics are also undergoing excavation. The admission fee includes entrance to a small interpretation centre and museum.
