San Juan National Historic Site

San Juan National Historic Site

Puerto Rico

Managed by National Park Service

Established 1949

75 acres



San Juan, Puerto Rico was established in 1509 as a military outpost by Spanish conquistador Juan Ponce de León and 30 years later construction began on the Castillo San Felipe del Morro to guard San Juan Bay.  Starting in 1634, Castillo San Cristóbal was added to the east, eventually becoming the largest fortification built by Europeans in the Americas (covering 27 acres).  The city was captured by the English in 1598, but quickly abandoned due to disease and lack of provisions.  U.S. warships destroyed the fort’s lighthouse during the 1898 Spanish-American War, after which the U.S. seized Puerto Rico and Guam, gained protection over Cuba, and bought the Philippines.  The U.S. military turned over the San Juan forts to the National Park Service in 1961, and 22 years later they were declared a UNESCO World Heritage Site.


Castillo San Felipe del Morro (El Morro), Castillo San Cristóbal, Paseo del Morro

Must-Do Activity

It does not matter which fort you start with, but both are unique and worth exploring with plenty of interpretive signs found throughout.  It is about a one-mile walk between the two forts on a sidewalk that follows the wall and bastions protecting the north side of Old San Juan (and providing a great overlook of the Cementerio Maria Magdalena de Pazzis).  Most visitors arrive by cruise ship, so drivers are very aware of pedestrians, and the whole area has sidewalks and crosswalks.

Best Trail

The Paseo del Morro follows the shoreline outside the walls surrounding the western edge of Old San Juan, only accessible from Castillo San Felipe del Morro or further south through the San Juan Gate.  Watch for friendly feral cats, huge orb-weaver spiders, and anole lizards along the paved route.

Instagram-worthy Photo

The forts’ sentry boxes (garitas) are the symbol of Old San Juan and all of Puerto Rico.  We had to add this park to the list of Top 10 National Park Service License Plates.

Peak Season

Year round



$10 per person or America the Beautiful pass

Road Conditions

Street parking is always full around the forts, but there is a parking deck with reasonable hourly rates.  The free White Trolley runs between the two forts and the cruise ship piers.


There are no campgrounds in San Juan, but plenty of other accommodations.  Camping on the island of Puerto Rico is permitted at Bosque Estatal de Cambalache, Bosque Estatal de Río Abajo, and Reserva Forestal de Carite.

Related Sites

Castillo de San Marcos National Monument (Florida)

Christiansted National Historic Site (U.S. Virgin Islands)

El Yunque National Forest (Florida)

Explore More – Who was the Irish-born engineer who designed Castillo San Cristóbal, because Spain and Ireland were both enemies of England?

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