Go to the zoo. I love the dc zoo. It is my absolute favorite thing in dc. If you like movies I'd head out to down town Silver Spring (right outside of DC, really easy to get to) and check out the AFI silver. Its right next to the Silver Spring metro stop. I like all the museums. I'd take the metro everywhere. Just get an all day pass. I've never been there, but I've heard good things and really want to go to the Spy Museum. There are tons of things to do in DC. If you're bored than you just arent trying hard enough. If you're driving there and you aren't in to museums come up to Baltimore and check out the aquarium or the Baltimore zoo. The DC zoo is a lot better and free though. DC cops are ass holes. So are metro police. They have better things to do than hassle tourists though as long as you behave yourself.