Udar Hazy (SP?)
Whilst the Smithsonian at Dulles is a smorgasboard of flight (Especially the De Havilland Chipmunk, which I learnt to fly in), the real interesting artefact is downtown DC, where they actually have a secondary Skylab.
1. It ain't pretty. It's this horrible cat vom yellow, IMMSMC, but amazing nonetheless.
2. It's amazing how they took a stage of the Saturn 5 and managed to shoehorn in Skylab
3. It's both big and small at the same time. You really do have to see it to comprehend both