The Alcazaba of Badajoz stands as Europe's largest fortress, covering an impressive 8 hectares with a perimeter of approximately 1,300 meters atop the Cerro de la Muela overlooking the Guadiana River. Built by the Almohads in the 12th century, this Moorish fortification controlled passage from Portugal to central Iberia and reflects the region's rich Islamic heritage. The structure features distinctive architectural elements including the prominent Torre Espantaperros tower, inner courtyards, cisterns, and gardens inspired by Islamic design principles. Now housing the Provincial Archaeological Museum, the fortress remains a testament to medieval military engineering and cultural achievement.