Gulf Islands National Seashore: Fort Pickens:

Dunes

 thumbnail Gulf Islands National Seashore: Fort Pickens: Dunes

Fort Pickens is the largest of four forts built to defend Pensacola Bay, Florida, and its navy yard. The fort was begun in 1829, completed in 1834, and used until the 1940s. Built in the age of wooden warships and cannons firing round balls, the fort underwent changes in response to advances in weapon technology following the Civil War. [Click here for more info](http://www.nps.gov/guis/planyourvisit/fort-pickens.htm)