This photogenic fort is an atmospheric monument to longevity: it's the country's oldest masonry fort, completed by the Spanish in 1695. In its time, the fort has been besieged twice and changed hands between nations five times – from Spain to Britain to Spain Part II to the USA to the Confederate States of America to the USA again. Park rangers lead programs hourly and shoot off cannons most weekends.

　　There is a parking lot on site, but blink your eye and it will be filled up.