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Castillo de San Marcos National Monument
Castillo de San Marcos National Monument

Castillo de San Marcos National Monument Tours and Activities

Free admission

St. Augustine’s Castillo de San Marcos National Monument is the oldest masonry fort in the United States and the only intact 17th-century fort. Constructed by the Spanish in 1672 to protect their New World territories, it eventually passed to the British and Americans, and it played a crucial role in the Civil and Spanish–American wars.

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Tours and Activities to Experience Castillo de San Marcos National Monument

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