Join millions of curious travelers.

Get early access to exclusive partner discounts, tips & user itineraries.

We promise not to spam you!
  • How It Works
  • Get Inspired
  • Pricing
  • Blog
  • Login

Navigation

  • Blog
  • Destinations
  • Contact

Follow us

Terms & ConditionsPrivacy Policy
© 2026, TravelPal, Inc. All rights reserved.
0/200
Get InspiredNorth AmericaUnited StatesFloridaSaint AugustineCastillo de San Marcos National Monument

Castillo de San Marcos National Monument

US
National Monument·Historic, Educational, Atmospheric
Crossing a dry moat, this drawbridge was the only way into the Castillo.
Photo by from Nps
This furnace, in the water battery on the east side of the Castillo, heated cannonballs red hot to be fired at wooden vessels.
Photo by from Nps
The Castillo features both iron and bronze cannon and mortar from the period.
Photo by from Nps
Cannon firing demonstrations are scheduled five times a day every Friday, Saturday, and Sunday.
Photo by from Nps
the Castillo commands the northern edge of the heart of downtown St. Augsutine.
Photo by from Nps
Crossing a dry moat, this drawbridge was the only way into the Castillo.
Photo by from Nps
This furnace, in the water battery on the east side of the Castillo, heated cannonballs red hot to be fired at wooden vessels.
Photo by from Nps
The Castillo features both iron and bronze cannon and mortar from the period.
Photo by from Nps
Cannon firing demonstrations are scheduled five times a day every Friday, Saturday, and Sunday.
Photo by from Nps
the Castillo commands the northern edge of the heart of downtown St. Augsutine.
Photo by from Nps

Castillo de San Marcos National Monument is a monumental piece of Spanish colonial history situated in the heart of Saint Augustine. As the oldest masonry fortification in the continental United States, the fort was strategically built to protect Florida and vital maritime trade routes. Its distinctive construction using coquina—a limestone composed of shell fragments—allowed the structure to survive numerous sieges by absorbing cannon fire rather than shattering. Today, visitors can explore the historic casemates, walk the expansive gun deck for panoramic views of the Matanzas River, and learn about the intersection of cultures over four centuries. It remains one of the most significant historical sites in the Americas, offering a deep dive into military architecture and colonial heritage.

Castillo de San Marcos National Monument is a monumental piece of Spanish colonial history situated in the heart of Saint Augustine. As the oldest masonry fortification in the continental United States, the fort was strategically built to protect Florida and vital maritime trade routes. Its distinctive construction using coquina—a limestone composed of shell fragments—allowed the structure to survive numerous sieges by absorbing cannon fire rather than shattering. Today, visitors can explore the historic casemates, walk the expansive gun deck for panoramic views of the Matanzas River, and learn about the intersection of cultures over four centuries. It remains one of the most significant historical sites in the Americas, offering a deep dive into military architecture and colonial heritage.

Address
11 South Castillo Drive
Websitenps.gov
Phone9048296506

Highlights

  • Oldest masonry fort in the continental U.S.

  • Unique coquina shell-limestone construction

  • Panoramic views of the Matanzas River

  • Interactive historic casemates

Before you go: Castillo de San Marcos National Monument essentials

  • The fort is built from coquina, a unique local limestone that is soft and porous.

  • The site offers excellent vantage points for photography overlooking the Matanzas River.

  • Expect significant walking on uneven historic stone surfaces.

Best For

History buffs and families interested in colonial architecture.

Currency

USD $

Average Cost

$100-$200 p/day

Languages Spoken

English, Spanish

Occasion Tags

Tourists, Family, Educational

Add dates for experiences

Location

Saint Augustine, Florida, United States
Open in Maps