The Spitfire, Stuka, and the U-boat are all on display at the Museum of Science and Industry in Chicago, alongside all kinds of other artificats and exhibits:
https://www.msichicago.org/
It's one of my personal favorite museums, and one of the only buildings that remain from the "White City", the Colombian Exposition in 1893. Plus, EAA members get free admission as part of the ASTC Passport program.
End of sales pitch.