Walls of Old San Juan
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The Walls of Old San Juan is a defensive city wall that surrounds the western end of the San Juan Islet, site of the historic district of San Juan, Puerto Rico. This defensive wall system was built be
Western wall from Paseo de la Princesa towards Castillo San Felipe del Morro
Plaza de Santiago (today Plaza Colón), site of the former Gate of Santiago (Puerta de Tierra).
San Sebastián Bastion and La Perla.
Gate of San Juan (Puerta de Agua)
Línea Avanzada
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The Advanced Defense Line is a historic district consisting of four structures that formed part of the eastern defensive system of the Islet of San Juan in San Juan, Puerto Rico.
Fortín de San Gerónimo
Fortín de San Gerónimo in El Boquerón.
San Gerónimo Powderhouse in the Luis Muñoz Rivera Park.
El Escambrón Battery