Along with the Shedd adn the Field Museum, the Planetarium is right there on the Museum Campus. It's right on the lake, and quite beautiful.
Check out
www.explorechicago.org. Lots of things to do and information on how to get there.
The Art Institute is amazing. They have a new Modern Wing -- haven't seen it yet, but it's supposed to be wonderful.
The Sears Tower is now called The Willis Tower. Most cabbies probably know Sears more than Willis, but just in case you're looking in a (very) current guidebook and can't find the Sears, look or ask for the Willis Tower.
If you're interested in seeing a show, you can get half-price day of show (or next day) tickets at the Hot Tix booth at 72 E. Randolph (right downtown, the concierge or front desk of your hotel can help you). Check out what's available at
www.hottix.org. There are 5 or 6 shows listed right now -- it's really hit or miss as to what's available, but there's always good stuff.
I think this is the 5th or 6th inquiry I've seen on this board in the last 6 weeks about trips being taken to Chicago! I think that's great -- Chicago is one of the most wonderful cities in the country.
Just about every big city has a Macy's these days, but the downtown Chicago Macy's used to be Marshall Field's -- the building is gorgeous, unique and historic. It's worth a trip just for the restaurants and the building, even if you don't want to shop.
Step into the lobby of Orchestra Hall, across from the Art Institute on Michigan Ave. It's really striking. There may be some wonderful program going on the evening you'll be there.
Be sure to walk around Millenium Park, right on Michigan Ave. You didnt' say when you're going but there may be a festival going on. And LIncoln Park Zoo is free (except for parking) -- it's a small zoo, but quite nice.
Have a great time!
Erin