Great Dismal Swamp

Picture of the Day for 7/17/2015. I discovered flightradar24.com recently and I'm totally obsessed with this site. It shows every flight that is in the air any place in the world in real time. You can click on a plane and the site will give you details about the aircraft (flight number, aircraft type, speed, elevation, flight path). I was playing around on the site and noticed planes flying over a place in Virginia/North Caroling called the Great Dismal Swamp. That name delights me to no end. I'd love to know that background story.