• Built by the Spanish in St. Augustine to defend Florida and the Atlantic trade route, Castillo de San Marcos National Monument preserves the oldest...
  • The Castillo de San Marcos (Spanish for "St. Mark's Castle") is the oldest masonry fort in the continental United States...
  • Castillo de San Marcos was built to protect Spanish interests in the New World from foreign adversaries like the British and pirates.
  • The Castillo de San Marcos is a historic fort in St. Augustine, Florida that the Spanish built to protect their settlement from pirates, Native American attacks...
  • The oldest permanent seacoast fortification in the continental United States, Castillo de San Marcos, in St. Augustine, Florida, was built between 1672 and 1756.
  • Sail along the Matanzas Bay on Florida ’s shores and you will quickly spot the gray towers of Castillo de San Marcos, a historic fort in St. Augustine , famous for its...
  • The Castillo de San Marcos, the oldest masonry fort in the continental United States, is a large Spanish stone fortress built to protect and defend Spain's claims in...
  • Castillo de San Marcos is situated in St Augustine, Florida – a historic town settled by Spanish explorers.
  • Interior of the Castillo The Castillo de San Marcos was called Fort Marion after Florida became part of the United States.
  • National monument, the Castillo de San Marcos, is the oldest masonry Fort in the United States and the only standing 17th century military construction.
  • Castillo de San Marcos Hot Shot FurnaceThis furnace, in the water battery on the east side of the Castillo, heated cannonballs red hot to be fired at wooden...
  • A sentry box turret overlooks Matanzas Bay at the Castillo de San Marcos, a seventeenth century Spanish Fort in Saint Augustine, Florida.
  • Today's population is about 15,000, its home to Castillo de San Marcos, Spanish Fort built in the 1700's.