Castillo San Cristobal
Castillo de San Cristobal is additionally being called as Fort San Cristobal. The stronghold is inside the San Juan National Historic Site and it was made by the Spaniards some time ago as a guarded structure to secure San Juan city.
It was built in 1783 and UNESCO considers it as a World Heritage Site. It was additionally assigned as a U.S. National Register of Historic Places goal. Try not to leave Puerto Rico without going by this vital landmark.