Ruinas del Castillo de Diempures

Cantalojas, Spain, Spain

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Ruinas del Castillo de Diempures in Cantalojas, Guadalajara province, Spain, are the remnants of an 11th-century medieval fortress possibly built atop a Celtiberian site, uniquely constructed from slate slabs joined with mortar.

Perched on a triangular rocky spur flanked by sheer 100-meter cliffs on three sides, it features a linear facade with a tall narrow arched entrance, saeteras for defense, a small moat, and likely a former homage tower, serving as a frontier watchpost near the Río Sorbe.

First documented in the 12th-century Fuero de Atienza under Alfonso VI, it ties into local 14th-century legends of betrayal and now draws explorers despite overgrown access and ongoing erosion.