OK, so urban_bohemian posted about the "America I AM" exhibit at the National Geographic Museum, and I realized I'd never been there, so I followed the link on their address page to get directions.
I swear on Quincy's life1, this is exactly what Bing gave me for directions:
Closeup on the Annapolis leg (which, besides the obvious, also isn't anywhere near downtown DC):
I believe I may submit this to Failblog.
1Well, you'd need to take that a little more seriously than you would normally, I suppose...