Castillo de Montalbán rises on a steep hill dominating San Martín de Montalbán in the Montes de Toledo, with origins tracing back to the Islamic era and substantial reconstruction during the 12th and 13th centuries following Christian reconquest. Built or reorganized by the Templars and later administered by the Order of Calatrava, the fortress exemplifies pure military design without residential concessions, featuring multiple defensive walls, robust towers, and a commanding keep perched on a 100-meter escarpment cut by the Torcón River. Guided cultural tours available on weekends showcase this strategically positioned stronghold that served as the Order's most important Castilian commandery.