Castillo de Priorio, also known as Castillo de Las Caldas, is a crenellated medieval fortress located near Oviedo in Asturias. Rising dramatically from a small hill surrounded by the Gafo River, the castle features two prominent towers flanking its main structure and is set amid dense vegetation that adds to its romantic appeal. Built during the medieval period, its exact construction date remains uncertain, though it is believed to have played a crucial defense role in the region. Though not currently open to the public due to private ownership, the castle's well-preserved state showcases medieval Asturian military architecture.