Gibralfaro castle is a 674-year-old fortress located in Málaga, Spain that was built by Abderramán III and Yusuf I near the city center and underwent a heavy siege by the Catholic Monarchs in 1487; it has since been converted into a popular tourist attraction accessible through a new large door and windows that receives visitors each year who can learn about its history as originally a fortress with a road for entering and exiting.