Castillo de la Peña stands majestically atop a high hill dominating Martos in Jaén's Sierra Sur region. Built in the 14th century by the Order of Calatrava, it stands over centuries of fortifications dating to Roman and Iberian times, originally known as the ancient city of Tucci. The fortress features a trapezoidal plan with a dramatic winding approach from the south, designed to hinder intruders. Ruins of gate towers, circular and square towers, a moat, and cistern remain visible, though mostly collapsed. Declared a historic monument in 1985, this multi-layered site reveals the peninsula's rich defensive history and rewards visitors with commanding views across the surrounding landscape.
