"The Forts of Old San Juan, El Morro, and Fuerte San Cristobal Old San Juan may look, at first glance, like a few other charming cities built during the height of Spanish colonialism—Havana or Santo Domingo, for example—but what sets it apart is the extent to which its architectural infrastructure from that era remains visible. It’s the only city that has its original colonial wall almost entirely intact, and both of its principal forts are in excellent condition, remain accessible to the public, and offer panoramic views of the Atlantic Ocean(so bring your camera). Both El Morro and Fuerte San Cristobal are run by the National Park Service; guided tours will leave you with greater knowledge about the era, as well as theforts’ construction and their role in Puerto Rican history. (There are other, smaller forts in and around the capital, next to the Caribe Hilton, and in Luís Muñoz Rivera Park, plusFort San Juan de la Crúz in the nearby town of Cataño.)"