Fortaleza de Monterreal in Baiona, Galicia, dates to the 11th century and showcases a blend of medieval and Renaissance architectural styles while occupying the entire Monte Boi peninsula, spanning 18 hectares surrounded by three kilometers of defensive walls. Three primary towers define its structure: the Torre do Relógio at the entrance with an alarm bell, the Torre de la Tenaza to the east defending the port with artillery, and the Torre del Príncipe displaying coats of arms and serving as a lighthouse. Built between the 11th-17th centuries as a crucial strategic defensive point against continuous attacks, the fortress was essential to protecting the town and estuary. Today the fortified precinct houses the Parador Nacional Conde de Gondomar, inaugurated in 1966, transforming this formidable coastal stronghold into a luxury hospitality venue while preserving its defensive heritage and magnificent Galician seaside setting.