Reg|Photography4Lyfe posted a reply:
Eats is one of my favorite things to do when I travel and one of the best eats is Ollie's Trolley. They got great burgers and chips and is a mini museum. Then there is the famous landmark Ben's Chili Bowl. All over you'll find Potbelly sandwich shops if you want a quick sandwich at a cheap price. These are the top places I recommend to eat all the time.
It's kind of out of the way but the Air & Space Museum at Dulles is a home to many historical forms of travel of the subjects like the Concorde and the Blackbird are housed here as well as a NASA space shuttle. For picture taking around DC, one of the best places to shoot is the FDR Memorial. You've got a great view of landmarks from here. Aim for dawn as this is when places are it's clearest if you want a people free shot.