i was born and raised in chicago and was fortunate to tour this boat when i was a kid of about 13. when i saw it it was still outside. now its nice to see that the boat is hangared. so for all that can't make it to chicago:
http://www.msichicago.org/exhibit/U505/index.html
check out the virtual tour along with the rest of the links.
are there really only 4 u-boats left in the world?
make sure you play the game...not sh3 but still cool
http://www.msichicago.org/exhibit/U5...and/index.html