Fort
Castillo de San Marcos
St. Augustine, Florida
- Completed
- 1695
- First lit
- —
- Height
- 30 ft
- Status
- Standing sentinel
- Visited
- Add your year
The oldest masonry fort in the United States, built of coquina — the shell-stone that absorbs cannonballs instead of shattering. For over three centuries the star-shaped fort at St. Augustine has flown the flags of Spain, Britain, and the United States without once being taken by force.