Chicago's Field Museum

The Field Museum is one of those things you "have to do" if you're spending a week in Chicago. It's arguably the most stunning building on Museum Campus which is saying a lot because the Shedd Aquarium and the Adler Planetarium are there too. Solider Field is nearby, but it's not that interesting because the Chicago Bears haven't been playing good football the last few decades.
Any way, I'm not into science, so I tend to get bored there. But if you're really, really into natural history, this place is your Mecca because it's full of artifacts, some almost as old as the last time the Chicago Bears won a Super Bowl.