Illinois is known to be pretty flat.
In the years we have lived here we got kind of used to it. Prairies, rivers, and sometimes forests are mostly the landscape around here. No mountains or even hills. In fact, the only hill in the area is a garbage hill, a huge landfill full of old trash, overgrown with grass. I mean, you wouldn’t guess it if you wouldn’t know, you can even go up there and have a nice view but it is still just filled with trash.
But, if you think that all of Illinois is flat you would be mistaken…