When visiting Old San Juan, you must visit these forts. These have to be the places where the most beautiful pictures of San Juan are taken from. Castillo de San Cristobal had the most awesome views of the city. This tour is typical of any fort with cannons and cannonballs. On the first level, each room displays the history of the fort and Puerto Rico. Second and third levels have the awesome views of the city.
Bring your camera and take your own postcard-like pictures.