Fuerte San Cristóbal
- Old San Juan
- adult/child $3/free
- 9am-5pm Jun-Nov, 9am-6pm Dec-May
Lonely Planet review for Fuerte San Cristóbal
San Juan’s second major fort is Fuerte San Cristóbal, one of the largest military installations the Spanish built in the Americas. In its prime, San Cristóbal covered 27 acres with a maze of six interconnected forts protecting a central core with 150ft walls, moats, booby-trapped bridges and tunnels.