If your trip to Chicago is all booked but your travel itinerary is a bit on the empty side, let us give you a helping hand.You might need to ask your boss for an extra week off, because Chicago is overflowing with iconic attractions. Get started at Art Institute of Chicago and Millennium Park. Don't miss Skydeck Ledge and Willis Tower either.You'll need to rise with the sun if you want to check out all the interesting sights this place has to offer. Chicago Cultural Center and Buckingham Fountain are must-sees. Merchandise Mart and Wrigley Building can't be missed either.Not too far from the city center, Chicago Theatre is one sight to consider adding to your to-do list. If you still have space on that travel schedule, Chicago Riverwalk and Water Tower Place will keep you entertained too.