Castle Carchuna stands near the coastal towns of Carchuna and Calahonda in Motril municipality, Granada province, designated as a Cultural Heritage Asset since 1993. Built in 1773 by royal order of King Carlos III, this fortress functioned as a coast battery to protect the area from piracy, hosting four guns, cavalry, and infantry units. The castle formed part of a vital Mediterranean defensive network against persistent pirate attacks. During the 20th century, it served as Civil Guard barracks in the 1950s-60s and as a Spanish Civil War prison facility. The fortress exemplifies the strategic coastal fortifications that secured Granada's maritime interests.