National Park Service, Florida.
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.
The monument is open 9am - 5pm Wednesday - Sunday only, and closed on Monday and Tuesdays until further notice.
Due to Covid 19 we are restricting the number of visitors in the fort at any one time to 100 people. All visitors will wait in line for entry regardless of type of entry receipt, tickets or passes.
Purchasing this digital ticket will allow for contact free scanning for entry at entrance.
On State Route A1A overlooking Matanzas Bay in the heart of the historic district of Saint Augustine, the Castillo is approximately a five mile drive from Interstate 95.