The history · St. Augustine, Florida
The coquina fort on St. Augustine's harbor front
Castillo de San Marcos is a masonry coastal fort in St. Augustine, Florida, run by the National Park Service as a national monument and open seven days a week except Thanksgiving and Christmas 1, 2. It stands at 1 South Castillo Drive on the waterfront, with a gun deck that staff close during thunderstorms and lower interior rooms that stay open in bad weather 2, 3. Visitors commonly describe footsteps and voices in the vaulted interior rooms, figures in period military dress on the gun deck and in the courtyard, and a sense of being watched in the old prison and powder rooms.
Sources
- Castillo de San Marcos National Monument (U.S. National Park Service). National Park Service 2026-03-16
- Operating Hours & Seasons - Castillo de San Marcos National Monument (U.S. National Park Service). National Park Service 2025-01-19
- Fees & Passes - Castillo de San Marcos National Monument (U.S. National Park Service). National Park Service 2024-03-21




