I was born and raised in DC area, but moved away 30 years ago. Many of you know that it's an unwritten rule that locals can't go sightseeing. But now I will be visiting (house sitting and dog sitting for 2 weeks) without family, so I'll get to play unrepentant tourist with few commitments. It will be late March (Cherry Blossom Festival).
Suggestions in terms of galleries, exhibits, museums, etc? I'll visit the Smithsonian (especially American History and American Art). There's an Annie Liebovitz exhibition at American Art Museum.
I will also go to Holocaust Museum and Lincoln Memorial (though not to photograph). I'll have a car but will probably take Metro downtown if during rush hour.