Comment Kansas Cosmosphere and Space Center (Score 3, Informative) 363
http://www.cosmo.org/
I went here this summer, it's in Hutchison, KS, and has a wide range of actual flight hardware from various space missions - including the Apollo 13 CM. There's also an actual SR-71 Blackbird and genuine V-1 and V-2 rockets from WWII.
Worth a trip if you're passing through!