Castillo de San Marcos
The Castillo de San Marcos is a Spanish masonry fort on Matanzas Bay, built of coquina stone between 1672 and 1695 to guard St. Augustine. It is the oldest masonry fort in the continental United States; visitors walk its bastions, gun deck and vaulted rooms, now run by the National Park Service.
Good to know
- Opening hours
- Mon–Sun 09:00–17:00
Hours checked October 15, 2026 · source nps.gov
When to go
Today’s hoursAll weekHide week
Nearby
St. Augustine Pirate & Treasure Museum
museum
From $20.22
Colonial Quarter
historic site
From $15.96
St. Augustine Shipwreck Museum
museum
From $15
Ripley's Believe It or Not! St. Augustine
museum
From $25.55
Potter's Wax Museum
museum
From $18.11
Medieval Torture Museum
museum
From $24.99
Cathedral Basilica of St. Augustine
church
Bridge of Lions
bridge
Frequently asked questions
What are the opening hours of Castillo de San Marcos?
Opening hours: Mon–Sun 09:00–17:00.