San Felipe del Morro Fortress
One of the oldest and largest Spanish forts in the Caribbean, El Morro has stood watch over the entrance to San Juan Bay since the 1500s. As a UNESCO World Heritage Site and a National Historic Site managed by the U.S. National Park Service, the fortress is Puerto Rico’s most iconic landmark. Visitors can explore the Torre Antigua (Old Tower), the oldest part of the fort, see cannon emplacements and go inside the sentry boxes, or garitas. The ocean views from the ramparts are spectacular.