The Willis Tower (formerly the Sears Tower) is the tallest free-standing structure in the Upper Midwest.
Many of Chicago’s famous elevated trains run underground.
The L is the only major transit system in North America, and possibly the world, that has a Pink Line.
Chicago’s nickname, “Second City,” refers to its being the second-largest city in the United States (after Los Angeles) that is not New York.
Every day, the Chicago Mercantile Exchange sets the price for a U. S. senator, a U. S. representative, an Illinois governor, and many other important officials.
Chicago controls the food prices for the entire world, but fortunately no one would ever use that power for evil.