Castillo de Arganzón

Castillo de Arganzón rises dramatically over a rocky promontory above the Zadorra River gorge in Burgos province, part of the historic Condado de Treviño region. This medieval fortress belonged to the influential Velasco family during its height. Surrounded by dense oak forest and set in a natural, wild landscape, the castle occupies a nearly inaccessible position with an irregular plan adapted to the bedrock foundation. Today, visitors can reach the remains via hiking paths that traverse the woodland, discovering the Torre de los Moros—a 17-meter square tower with ashlar walls—along with traces of the original moat and cistern, offering a tangible connection to medieval frontier defense.