Castillo de San Marcos National Monument — Live Alerts, Weather & Trip Planning

Located in FL.

Built by the Spanish in St. Augustine to defend Florida and the Atlantic trade route, Castillo de San Marcos National Monument preserves the oldest masonry fortification in the continental United States and interprets more than 450 years of cultural intersections.

Use this page to check live NPS alerts, weather, things to do, events, fees, campgrounds, and build a day-by-day itinerary with Trailie.

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