The DC Commission on the Arts and Humanities now has an exhibition on view in their virtual gallery space, Our City, Ourselves: Women Photograph Washington.
I highly encourage you to spend some time in the exhibition; it celebrates not only the talented and perceptive women photographers working in the District over the past 40 years, but also the history and evolution of the city itself.
You can see the exhibition webpage here: http://bit.ly/CAHOurCityOurselves or you can go directly to the virtual gallery here: http://bit.ly/OurCityOurselves.