The most important and best-preserved remains of the Moorish occupation are joined to the Alcazaba. The Phoenicians are believed to have built a fortress on this craggy hill first, but it was Sultan Yusuf I of Granada who had the Coracha (a walled passageway that connects the Alcazaba and the castle) built in the 14th Century. The structure has been modified many times over the years as part of the city's defenses and stands as a chronicle of Malaga's rich history. Visitors can walk up from the pretty Puerta Oscura gardens to the medieval castle which promises panoramic views of Malaga and its bustling harbor dotted with white boats in the distance. There is an interpretation center on-site as well as a military museum.