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park brochure showing an aerial photograph with different building features labeled. Some photographs of a Spanish flag, people in costume and exhibits.
This is Castillo de San Marcos' official park brochure
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National Park Service
Public domain:Full Granting Rights
Castillo de San Marcos National Monument, Code: CASA
Castillo de San Marcos National Monument, St. Johns County, Florida Latitude: 29.8978996276855, Longitude: -81.3122024536133