A World Heritage Site
Designated in 1983, San Juan NHS includes Castillo San Cristóbal, Castillo San Felipe del Morro, and Fortin San Juan de la Cruz known locally as El Cañuelo, bastions, powder houses, and three fourths of the city wall surrounding. These magnificent fortifications were built by the Spanish beginning in 1539 with a tower at El Morro and La Fortaleza and took more than 250 years.