Castillo San Cristóbal

The largest fortress Spain built in the Americas, designed to defend against attacks from the land. From its ramparts, you can look out over the Atlantic and the Old City at the same time.

Castillo San Cristóbal was built between 1634 and 1783. It covers about 11 hectares and is the largest defensive fortification Spain constructed in the Americas. Together with El Morro, which guards the sea, it forms San Juan’s defense system, with one fortress guarding the sea and the other the land. The castle uses a “defense in depth” design, consisting of multiple gun batteries, moats, tunnels and concealed firing passages. Visitors can explore the underground tunnels, a reconstructed soldiers’ barracks exhibit and the famous “Devil’s Sentry Box” (Garita del Diablo), where legend says a sentry once vanished without a trace. In the Spanish-American War of 1898, the first shots of Puerto Rico’s fight were fired here. It is part of the San Juan National Historic Site together with El Morro, and the tickets are valid for both. It is located at the eastern entrance of the Old City. Walking along the northern city walls between the two castles takes about 20 to 25 minutes, with views over the La Perla seaside neighborhood along the way.

Castillo San Cristóbal

Opening hours

Nearby sights

Places to eat nearby