• Fort Matanzas

    Fort Matanzas

    National Monument Florida

Contact Us

Mailing Address:

8635 A1A South
St Augustine, FL
32080

Phone Numbers:

Headquarters (Castillo de San Marcos and Fort Matanzas National Monuments): 904-829-6506, x227

Fort Matanzas Visitor Center and Office: 904-471-0116

Fax: 904-471-7605

E-mail:

Click here to send an electronic message

Did You Know?

A Spanish bronze cannon shown the characteristic green patina caused by copper rusting

Black, or gun, powder is a mix of potassium nitrate, sulfur, and charcoal used as a propellant charge in cannons.  Burning rapidly when ignited, it expands 600 times its volume creating pressures that can hurl a cannonball up to 3.5 miles! Ft Matanzas National Monument, Florida