‘Send it with a Castillo!’ St. Augustine fort now on priority stamp Updated: Tags: ST. AUGUSTINE, Fla. – Whether you’re a St. Augustine local or a returning visitor, chances are, you’ve made great memories at the Castillo de San Marcos in the heart of St. Augustine. Bill Stephenson and his wife, Carol, are visiting from Tennessee. Their first visit was in the 1970s, and have returned several times over the years. “What do you think of when you see it?”, News4Jax reporter, Ashley Harding asked. “I think of the history of the United States,” Stephenson said. “That’s what I think of, the independence of Florida.”