Covering about 27 acres, San Cristóbal is the largest fortification built by Spain in the New World.
Learn from the sourceAbout Castillo San Cristóbal
Why this place stands out
The largest Spanish fortification built in the Americas, guarding Old San Juan from land approaches with tunnels, ramparts, and coastal views.
Castillo San Cristóbal anchors the eastern edge of Old San Juan's historic defenses. Construction began in 1634 and expanded over generations until the fort covered roughly 27 acres, making it the largest fortification built by Spain in the New World. Visitors can walk through tunnels, ramps, troop quarters, cannon positions, and sentry boxes while looking across the Atlantic and modern San Juan. San Cristóbal belongs to San Juan National Historic Site and the UNESCO-listed fortifications recognized for adapting European military architecture to a Caribbean harbor.
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Location
501 Calle Norzagaray, Old San Juan, San Juan, PR 00901
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