Castillo de San Marcos (image) University of South Florida (USF Health) Share Print E-Mail Caption The Castillo de San Marcos is located in St. Augustine, Fla. Researchers from the University of South Florida in Tampa are working with the National Park Service in using 3-D imaging to preserve the historic site. Credit National Park Service Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.