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

    Castillo De San Marcos

    National Monument Florida

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  • Summer Weather

    Afternoon Thunderstorms can create dangerous amounts of lightning strikes. If Lightning is visible from the Castillo, Gundeck closures will take place. Click this link for the local weather forcast. More »

America Begins Here

A monument not only of stone and mortar but of human determination and endurance, the Castillo de San Marcos symbolizes the clash between cultures which ultimately resulted in our uniquely unified nation.  Still resonant with the struggles of an earlier time, these original walls provide tangible evidence of America’s grim but remarkable history.

Did You Know?

An old engraving shows Spanish Ships landing on a foreign coast

Because his arrival occurred at the time of the Easter feast or Pascua Florida, Ponce de León named the land, which he claimed for Spain, La Florida or “Place of Flowers” Castillo de San Marcos National Monument, Florida