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Castillo de San Marcos

Aerial view of Castillo de San Marcos

Visit Castillo de San Marcos in Florida: Complete Travel Guide

07/19/2026 by Cory Haasnoot

Castillo de San Marcos National Monument is the oldest masonry fort in the continental United States, built by the Spanish between 1672 and 1695 to protect St. Augustine, Florida. sits on the western shore of Matanzas Bay and has seen almost 450 years of cultural change and conflict. The fort changed hands from Spanish to … Read more

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