Castillo de Santa Catalina is an observation tower built in 1931 on a small hilltop in Tarifa, Cádiz, designed in the style of a 16th-century castle with distinctive Mudejar arches and corner balconies. Occupying a commanding position overlooking the Mediterranean, Playa Chica, and the Atlantic Ocean, this landmark dominates the strategic gateway between continents. Although damaged during the Spanish Civil War and abandoned for four decades, it was restored in 1972 and served as a control centre for shipping in the Straits of Gibraltar and a meteorological station. Today, this iconic structure remains a beloved symbol of Tarifa, though currently enclosed by fencing while awaiting future restoration plans for public access.