Historic Old San Juan Walk the cobblestone streets: Explore the historic city on foot, which is very walkable and packed with historic sites. Paseo de la Princesa: Take a scenic walk along this waterfront promenade, which is especially pleasant in the evening. Visit forts: Stroll the grounds of historic fortifications like Castillo San Felipe del Morro and Castillo San Cristobal for excellent views and photo opportunities. See the Cathedral: Tour the Catedral Basilica Menor de San Juan Bautista, the second oldest cathedral in the Americas. Fly a kite: The great lawn at El Morro is a popular spot for flying kites. Culture and Art Santurce street art: Admire the vibrant murals and street art in the Santurce neighborhood. La Placita de Santurce: Experience the local atmosphere, especially on weekends when you can find live music.