Castillo de San Marcos

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.

Started by the Spanish in 1672, the Castillo de San Marcos is the oldest masonry fort in North America.

From field trips to online programs, Castillo de San Marcos provides learning adventures for students and teachers throughout the the world. Come explore!