Los Tres Reyes del Morro Castle. In The Havana's "Morro" is one of most iconic monuments of the city. It is particularly beloved by the Havana's city inhabitants for its lighthouse. This symbolic building was constructed by the Spanish between 1589 and 1630 to protect Havana from incursions by enemy fleets and pirate ships. Havana's landmark fort is named for the Three Kings of Bethlehem, who are the patrons of its chapel and for the fact that it occupies a morro (promontory) at the harbor entrance. It and its sister fort across the way, La Punta, made Havana the safest port in the Americas. Built into cliffs, El Morro was furnished with a battery of 12 cannons christened "The Battery of the Twelve Apostles" facing the sea and another dozen, called "Las Pastoras" ("The Shepherdesses") nearer the ramparts. It was defended to the death by spanish Luis Velasco against the British when they took Havana in 1762.
The active lighthouse, which was added in around 1845, flashes its beam over Havana every 15 seconds. Inside the castle, across a moat and drawbridge, are stables, the chapel, dungeons, and a wine cellar. You'll also find the fortified vaults, which contain the Museum, with displays on the fortress itself.