I tried searching the site, but either my search-fu is weak or this topic doesn't exist already. I'm going to find myself in Chicago for a few days at the end of this month. Most of the time will be spent working, but I hope to have at least one evening and maybe a few hours one day to check out something I can only see in Chicago. So my question is - if you had a few hours in the day and then one free evening in Chicago, what would be at the top of the 'check it out' list? Thanks in advance for any tips.