“Built by the Spanish in St. Augustine to defend Florida and the Atlantic trade route, Castillo de San Marcos National Monument preserves the oldest masonry fortification in the continental United States and interprets more than 450 years of cultural intersections.
Castillo de San Marcos is open 7 days per week. And has a maximum capacity of 250 visitors in the historic fort at any time will be in effect. Formal programs and historic weapons remain suspended due to covid.”
Credit: National Park Services