This well-preserved, 16th-century fort sits within a broad cloverleaf moat. This is the oldest fort in Havana, and the oldest surviving fort in the hemisphere. It was actually pretty much a failure, built too small and too far from the harbor entrance to be of much use. Still, crossing over the old drawbridge and walking around the ancient stone battlements gives you a great sense of history. The most distinctive feature of this compact fort is the weathervane, La Giraldilla, which has come to be the city's defining symbol. The original 1634 bronze sculpture is now on display in the entrance; a copy adorns the top of the fort's bell tower. Today, the fort also contains exhibits featuring items salvaged from shipwrecks, as well as replicas of Spanish colonial boats. Kids will love the chests that are stuffed with gold, necklaces, emeralds, and rings, but the standout exhibit is a huge four meter- (13 foot-) long model of the Santísima Trinidad, the largest naval ship of its time; it sank after the Battle of Trafalgar.