• Cannon firing on the gundeck of the Castillo de San Marcos

    Castillo De San Marcos

    National Monument Florida

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  • 4th Of July Information

    The Castillo’s parking lot will be closed at 7:30 pm and will remain closed for the duration of the fireworks event. Alcoholic beverages are prohibited. Use and/or possession of all fireworks (including sparklers) are prohibited. All fires are prohibited.

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Did You Know?

Bronze Spanish cannons look out over the city of St. Augustine

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! Castillo de San Marcos National Monument, Florida