Castillo de San Andrés, constructed in Carboneras beginning in 1602 and completed in the 17th century, served as a key coastal defence against Berber raids and Morisco uprisings under King Philip II's fortification programme. The fortress presents a robust quadrangular masonry structure capable of withstanding artillery fire, originally featuring three cylindrical towers alongside a large three-storey square tower at the south corner, of which two towers remain standing. Restored in 2013 and now owned by the municipality, the castle offers free public access and regularly hosts temporary exhibitions, functioning as an active cultural venue within the historic town centre.
