Today you have several options you can choose from:
Museum of Art of Puerto Rico - Located in the neighbourhood of Santurce, near the tourist zone of Condado and Isla Verde. Contains one of the largest collections of Puerto Rican art dating back from the XVIII Century to the present.
San Felipe Del Morro Castle and Fort San Cristobal (San Juan National Historic Site) – Administered by the National Park Service. Explore the largest fortress built by the Spaniards in the New World; visit the dungeons, tunnels, sentry boxes and experience how the Spanish soldiers lived while defending the city walls and harbor from pirates, corsairs and buccaneers.
Casa Bacardí (Cataño) – Situated across the San Juan Bay in the nearby municipality of Cataño, you can visit the largest rum distillery in the world. Enjoy an interactive tour through history and learn the rum production process.