Castillo de Medellín is a medieval fortress perched on a hill overlooking the town of Medellín in Badajoz province, Extremadura. Built by King Henry II of Castile in 1357 atop a 10th-century Moorish fortress site, it features a distinctive double-walled perimeter fortified with numerous round turrets and reinforcing towers. The castle preserves a 12th-century underground reservoir within its walls. Extended during the 15th and 16th centuries, the structure embodies centuries of historical layering—from Tartessian and Roman settlements through Moorish occupation to Christian Reconquista. Its elevated position provided command over the Guadiana valley and the strategic Vía de la Plata trade route. Guided tours offer visitors glimpses into this multilayered historical heritage.