Castillo de San Marcos National Monument, St. Augustine, FL, Florida, Spanish fortress, Castillo de San Marcos Nat'l Monument, the oldest masonry fort in the United States, in the Old City of Saint Augustine.

cannons, Castillo de San Marcos National Monument, St. Augustine, FL, Florida, Spanish fortress, Castillo de San Marcos Nat'l Monument, the oldest masonry fort in the United States, in the Old City of Saint Augustine.

St. Augustine, Florida, fort, Cannon at the Spanish fortress of Castillo de San Marcos National Monument in the old city of Saint Augustine in the state of Florida. The oldest masonry fort in the United States.

St. Augustine, Castillo de San Marcos, fort, Florida, A crowd of people listen to a Ranger Talk inside the Spanish fortress of Castillo de San Marcos National Monument in the old city of Saint Augustine in the state of Florida. The oldest masonry fort in

St. Augustine, FL, Florida, Old Spanish Trail, Milestone-Zero, St. Augustine, FL to San Diego, CA