America Begins Here

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.

3D Rendering of Castillo de San Marcos NM
Castillo Virtual Tour

The Virtual Tour for the Castillo de San Marcos National Monument in St. Augustine, Florida.

Exhibit pane with text and flags in fort's casemate.
Things To Do

Review the menu of opportunities awaiting you.

Grass in foreground, splanish flag centered in image, chapel door and walls in background
Operating Hours

Learn more about the Castillo's hours of operation.

Seawall on east side of the fort. Wall, palm trees, water, and sail boats in background.
Learn About the Park

Explore photos, history, education opportunities, and more.

image of castillo de san marcos with film type frame
Castillo Videos

Explore the many stories of Castillo de San Marcos with these short videos.

Evening program in the courtyard by candlelight
Calendar of Events

Check out our calendar to learn more about upcoming special events.

Black & White image of Castillo's well in 1875
Photos & Multimedia

The interior well of Castillo de San Marcos in 1875-1878. And a room with windows in the South West corner.

Image of gun deck with cannons, bell tower, water, and palm trees.
Entrance Fees

Learn about parking and entrance fees.

Wheel chair and service dog.

Learn more about accessibility at Castillo.

Field trip of students on gun deck near cannon and bell tower.

Learn about field trips, curriculum, distance learning, and more.

Map of park on park app .
Park Mobile App

Download the Official Park Mobile App.

Front Page of Park Brochure
Official Castillo de San Marcos Brochure

Click here for a high resolution image

Front page of park brochure
Official Fort Matanzas Brochure

Click here for high resolution image.

Park footer

Contact Info

Mailing Address:

1 South Castillo Drive
Saint Augustine, FL 32084


904 829-6506

Contact Us