Okay, so this was on the return trip from our honeymoon back in 2003 ( Good Lord has it been that long!?). We were taking the train up from New Orleans and had a 6 hr layover in Chicago, until we got on the east bound Capitol Limited that we took as far as Pittsburgh. My wife and I had a great time in Chicago. We went to the John Hancock building, which is not as tall as the Sears Towers but is very impressive and has a great observation floor. We also had lunch in a world class Blues Bar, even shot a game of pool on blue felt. Also if you've watch The Untouchables, you can find the stairs from the train station shoot out right in the station. Just make sure you get back in time to catch your train! Definitely think of this time as an adventure, not a hindrance, there is a ton to do during your time there.
fyi- I have been to the science and Industry museum and I don't personally recommend it for this time period. that place is so fascinating you may feel like you didn't do it justice in the time allotted.
Have a great trip,
John Z
