Between the 16th and 20th centuries, a series of defensive structures was built at this strategic point in the Caribbean Sea to protect the city and the Bay of San Juan. They represent a fine display of European military architecture adapted to harbour sites on the American continent.
- Country
- United States of America
- Region
- North America
- Category
- Cultural
- Inscribed
- 1983
- UNESCO reference
- 266
- Area
- 33.39 ha