Shortly after graduating from high school, I took a trip to Pennsylvania to visit distant relatives. While visiting, one of the memorable places we went was Washington D.C., which aside from the politicians turns out to be a really neat place.
The obvious reason people go to D.C. is the Smithsonian, it's the grand-daddy of Museums. The one that really stands out though is the National Air & Space Museum. Back when I went, Udvar-Hazy center was not yet opened, so the last hyphen in the blog post title would not have been necessary. However, now we have to distinguish between the museum on the national mall, and that other one that has airplanes in it ;)
Some day perhaps I'll get back to the Udvar-Hazy portion of the museum, but till then I have fond memories of our nations air museum. Most planes housed in the NASM are of historic significance, and as such it is remarkable to be able to see them and get glimpse back into history.