Guaynabo: See
=== Old San Juan ===
San Juan National Historic Site, 501 Norzagaray St, ☏ +1 787-729-6960. 9AM-5PM. The park consists of multiple sites. Castillo San Cristóbal is one of the largest Spanish fortresses in the new world, and has a National Park Service visitor center off of Avenida Luis Muñoz Rivera. The center offers English and Spanish versions of an introductory film to the Historic Site, exhibits, and a bookshop. Castillo San Felipe del Morro (or el Morro) is a citadel with a commanding view of the entrance to San Juan Harbor, at the end of Calle Norzagaray. The extensive esplanade between the citadel and the town is popular for kite flying. Allow at least an hour to explore each fort. The park also includes most of the historic city walls, and tiny Fortín San Juan de la Cruz (or el Cañuelo) across the harbor on Isla de Cabras. $10/day adults, children under 15 free, national park passes includes up to 3 visitors. One ticket is good for both Castillos on the same day.
1 El Castillo San Felipe del Morro (El Morro). A 16th-century citadel that lies on the northwestern-most point of the islet of San Juan, Puerto Rico. It is part of San Juan National Historic Site and was declared a World Heritage Site by the United Nations in 1983.
El Castillo de San Cristóbal, ☏ +1 787-729-6960. A fort built by the Spaniards to protect against land based attacks on the city of San Juan. It is part of San Juan National Historic Site. It covers 27 acres of land and is 150 ft (46 m) tall.
Alcaldia, Calle de San Francisco (along one side of Plaza de Armas). San Juan's City hall, built in 1602. (updated Jul 2025)
The Institute of Puerto Rican Culture. (updated Jan 2016)
Casa Blanca, western end of Calle San Sebastián, ☏ +1 787-721-7000 ext 2358. Wed-Sun 8:30AM-noon and 1:30-4Pm. Ancestral home of the Ponce de Leon family, now a museum. $5 adults, $3 seniors/students/children. (updated Jul 2025)
2 La Fortaleza, western end of Calle Fortaleza, ☏ +1 787-724-1454. or the Palacio de Santa Catalina, "La Fortaleza" (or The Fortress in English) is the official residence of the Governor of Puerto Rico, who is Puerto Rico's head of Government. It was built between 1533 and 1540 to defend the harbor of San Juan. The structure is also known as El Palacio de Santa Catalina (or Palace of Santa Catalina). It is the oldest executive mansion in the New World. La Fortaleza was declared as a World Heritage Site by UNESCO.
3 San Jose Church. Built in 1523, when it was called the Church and Monastery of Saint Thomas Aquinas. It is the second oldest church in continuous use in the New World and the oldest in the United States. Before Ponce de Leon was moved to the San Juan Cathedral, his body was buried here for 300 years. (updated Jan 2016)
San Juan Cathedral, 153 Calle Cristo. contains the tomb of the Spanish explorer Juan Ponce de León. It was built in the 1520s, was soon wrecked by a hurricane, and then rebuilt in 1540. …