Mommy, Daddy and Johnny went to Willis Tower (formerly Sears Tower) while I was napping. It's the tallest building in North America. The 103rd floor has an observation deck and their new attraction is the Ledge boxes. They are glass boxes that protrude 4 feet over Wacker Drive. Mommy said it was kind of scary but really cool. See how you can see the city all around them (even below) in the picture above?Video from inside a ledge box.
The Willis tower from the bottom.