The view from the Old Postal Tower looking down Pennsylvania Avenue to the Capital Building. The first sinfully ugly building on the left is the FBI building, I think. At right is a view toward the Washington Monument; the ground around the monument is all torn up while workers install permanent barriers that are supposed to look like they've always been there are something like that.

At any rate, I do highly recommend a visit to the Old Postal Tower if you're visiting D.C. It's free, interesting, and the views are pretty spectacular.