The Castillo de San Marcos, built 1672-1695, served primarily as an outpost of the Spanish Empire, guarding St. Augustine, the first permanent European settlement in the continental United States, and also protecting the sea route for treasure ships returning to Spain.

Although the Castillo has served a number of nations throughout its history, it has never been taken by military force. During the 18th century, the Castillo went from Spanish control to British and back to the Spanish , who remained in power in Florida until the area was purchased by the United States in 1821. Called Fort Marion at this time, The Castillo was made a National Monument in 1924 and became part of the National Park system in 1933. The park consists of the original historic Castillo fortress itself with its attendant grounds, some 25 total acres.

 Directions 

Plane - Nearby Jacksonville and Daytona are served by international airports with easy access to I-95. Rental cars are available at the airports and in St. Augustine.

Car - From I-95: Take the exit for St. Augustine Historic Sites and Downtown (Route 16). Follow Rt. 16 to US 1. Turn right on US 1 for two miles to Castillo Drive. Turn left on Castillo to the traffic light. Turn right at the light. The Castillo and parking are ahead on the left. From A1A: The Castillo is located on A1A in downtown St. Augustine.

Public Transportation - There is no Public Transportation in St. Augustine, however, private companies operate tour trains, horse carriages, and bicycle and motor scooter rentals.