8635 A1A South
Headquarters (Castillo de San Marcos and Fort Matanzas National Monuments): 904-829-6506, x227
Fort Matanzas Visitor Center and Office: 904-471-0116
Did You Know?
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