Castillo de San Marcos, built with coquina, is the oldest masonry fort in the continental U.S. The fort has never been taken by force and became a National Park in 1933. It played a role in various ...
Complete guide to Castillo de San Marcos National Monument in St. Augustine, Florida including things to do, history, parking, nearby lodging and camping, and so much more. Castillo de San Marcos ...