Santiago Castle, built by Islamists, is one of the oldest fortifications in the Philippines. After the Spanish rule of the Philippines, the castle became the main defense against invaders. The most distinctive feature of this legendary castle building is the woodcarving of Santiago story on the gate, which witnesses the vicissitudes of Philippine history and the sea walls and guns in the castle. There are also many deep water dungeons used in World War II to hold people and guerrillas in Santiago Castle, also known as the "Holy Land of Freedom" in memory of Filipinos detained and killed during the Spanish and Japanese occupation. The castle, which was destroyed and rebuilt in World War II, has now become a good place for parks and walks.