Well, for anybody that grew up listening to Motown music, you could visit the Hitsville USA .

And I understand that the Ford Rouge Plant is going to resume public tours in the spring of 2004. They were stopped back in the 1970s some time. For more info, you can check the Henry Ford Museum Greenfield Village website, and follow the link. Also the museum and village are worth a visit by themselves, esp. the R. Buckminster Fuller Dymaxion House.