The Francisco Oller Museum consists of 2 floors of exhibits featuring the artwork of the first Hispanic Impressionist artist and Puerto Rico native, Francisco Oller, and other local artists' works. These include wooden carvings of saints, local artist Tomas Batista sculptures, and artifacts of ancient Taino native people.

Parque de las Ciencias (Science Park) is a 42-acre park and artificial lake for outdoor family fun, featuring a nature observatory and exhibits on archaeology, transportation, and space exploration, including the only NASA rockets on display outside of the United States.

The Ballaja Barracks were built in 1854-64 for Spanish troops and used extensively throughout the Spanish-American War. The barracks were used as an army hospital during World War II and then housed U.S. Infantry soldiers until 1939. Currently, the barracks serve as a Museo de las Americas with collections on Indians in America, Popular Arts in America, and African Heritage.

The Cathedral of San Juan Bautista was first constructed in 1521, making it the second oldest cathedral in the Americas, and contains the tomb of Puerto Rico's first governor, Juan Ponce de Leon. Though it has been rebuilt after several hurricanes threatened the building over the years, the interior remains ornate and decorated as it was in the 16th century.

San Juan National Historic Site consists of 3 forts (Castillo San Felipe del Morro, Castillo de San Cristobal, and El Canyuelo) and the fortifying walls around Old San Juan city, all built between the 16th and 19th centuries to protect the city and the Bay of San Juan.

La Casa Blanca was built by Juan Ponce de Leon, Puerto Rico's first governor, in 1521 as a fort for the city and personal residence, however he died before he was able to live there. Once the stone structure was complete in 1523, his family and ancestors lived there for 250 years and preserved it as an excellent example of a wealthy 16th century home.

The Puerto Rico Museum of Contemporary Art displays art work from the Caribbean and Latin America from the 1940s to today for the education and enjoyment of the public.

The Pablo Casals Museum is dedicated to the life and work of one of the world's best cellists, Pablo Casals, who was born in Catalonia, Spain, and became famous during the early 20th century. Casals traveled to Puerto Rico and created the Casals Festival of music, which is still held annually here. The museum has recordings of his performances and even his famous cello.

The Children's Museum (Museo del Ninyo) is Puerto Rico's only museum for kids and has hundreds of hands-on exhibits for kids of all ages. Check out the huge "erupting" indoor volcano, green screen for news casts, a real plane outside for exploring, dress-up costumes, and a build and race your own car exhibit!