Neil,
Albert Kahn's work is legendary in the Detroit-Windsor area. He designed the school my daughter's heading to right now!
Sean, being a Detroiter of sorts (!), beat me to it. During the 1920s, Detroit was almost the "place to be". Lots of money, and lots of stuff going on. I think it was the third largest city in America at the time... and growing.
It's sadly much different these days. But there's still some really cool building architecture in the city, and some pretty good golf courses in and around town.