Built by Charles III in 1767, it is a circular battery of four 24-calibre cannons. It presents both castle and fortress characteristics, including gigantic dimensions that reveal the military architecture of the time in its design and structure. It is one of the best examples of an 18th-century fort.

The fortress is situated next to La Duquesa beach, alongside the coastal town of Sabinillas. It was built in the 18th century by Francisco Paulino during the reign of Carlos 3rd, with the aim of defending the area against raids by pirates and corsairs. Until relatively recently, the castle was used as the headquarters of the local police and civil guard.

It now houses a mayor’s office, though its architectural and historical importance ensure that it is frequent port of call for visitors. The fortress was built using a series of walls barely a metre high left behind by the Romans. The castle housed cavalry and infantry detachments, as well as a straw loft, kitchen and chapel. It is now used to stage a number of cultural and recreational events, as well as displaying a number of archaeological exhibits discovered in the area.