Castillo San Juan de las Aguilas is an 18th-century artillery fort perched on a seaside ridge overlooking the port of Águilas in Murcia, Spain. Construction began in 1754 following engineer Sebastián Feringán's assessment and replaced an earlier 1579 watch tower that had deteriorated beyond repair. The fortress combines two distinct defense elements, the San Juan fortress and the San Pedro battery, connected by an outdoor walkway built on parallel retaining walls. Restored in 2007, the castle features small exhibition rooms displaying the fort's military history, local geology, and period living conditions. Its panoramic views and commanding position exemplify Spanish coastal defensive strategy during the Bourbon era.
