Fort Delaware is one of Delaware's first state parks, created in 1951. On the National Register of Historic Places, the Union fortress dates back to 1859, and once served as a prison for Confederate prisoners of war. It was originally built to protect the ports of Wilmington and Philadelphia. The State of Delaware acquired the Fort from the Federal Government in 1947.
Your day will be filled with hands-on history, which might include helping the blacksmith hammer out new parts for a cannon or working with the laundress. Watch our 8-inch Columbiad gun fire a live gunpowder charge! Our orientation room contains a diorama of Pea Patch Island as it appeared in 1864, and nearby exhibits contain artifacts from the Island's past.

Make a day of it — there is a food concession stand on the island. And if you like, you can bring a picnic lunch to enjoy in our picnic area - tables and grills are provided.

http://www.destateparks.com/fdsp/index.asp