If you look at a topographical map of the US there are a bunch of mountains in the West, a mountain range in the East, and in the middle there’s a bunch of farmland turning into the “Great Plains”. Chicago is solidly in the middle, by the letter “L” of “Lake Michigan” in this topographical map: https://kids.britannica.com/students/assembly/view/166203
If you look at a topographical map of the US there are a bunch of mountains in the West, a mountain range in the East, and in the middle there’s a bunch of farmland turning into the “Great Plains”. Chicago is solidly in the middle, by the letter “L” of “Lake Michigan” in this topographical map: https://kids.britannica.com/students/assembly/view/166203