In the heart of the historic quarter of El Puerto de Santa María stands the majestic Castle of San Marcos (Castillo de San Marcos) — a unique 13th-century medieval fortress. This remarkable structure, recognized as a national monument, holds centuries of history within its walls, where Roman heritage, Islamic architecture, and Christian Gothic are intertwined.

Built by the order of King Alfonso X the Wise, the castle did not appear out of nowhere: its foundation was a 10th-century mosque, and ancient Roman columns can still be seen in the masonry of its walls. Today, this complex in Spain is a prime example of the Mudejar style. The fortress's main pride is the octagonal Ghomage Tower and the preserved qibla wall, reminding visitors of the monumental structure's Eastern past.
Currently, the Castle of San Marcos is not just a historical site but a living cultural space that combines the functions of a museum and a winery. Here, you can touch ancient stones, see rare artifacts, and feel the spirit of the Reconquista era, making it a must-visit for any traveler in the province of Cádiz.