The L in Chicago is pretty easy to figure out particularly if you fly into Midway, it's a quick 30 minutes and then you're only a short walk to well...everything.
I previously went to Chicago in May for a quick few days and saw the usual: Millennium Park, Navy Pier, Michigan Avenue, etc.
This time I figured I should do something educational so I went to The Field Museum across from Soldier Field and not too far from Buckingham Fountain.
They had a pretty cool chocolate exhibit...that allowed no cameras. So I took pics in the gift shop.