Yes, we crossed Minnesota in a day.
The shift in terrain is dramatic. To me, anyway.
Eastern Wisconsin is rolling, with a lot of low, but steep hills. More relief than the northern part of Illinois, Indiana, or Ohio. Nothing like actual mountains of Western Pennsylvania. Enough ups and downs to make it challenging to pass an 18-wheeler.
The land seems lumpy enough to be distinctive.
This transitions — suddenly — to flat-ish. Western Wisconsin and much of Minnesota are mostly flat. Some hills and mounds. Wisconsin has a few out-of-place piles of rock. From this: https://wgnhs.uwex.edu/wisconsin-geology/ice-age/, it looks like glaciers didn't get down to where I-94 goes.
Avon, Minnesota seems to be the setting for Lake Wobegon. Pictures don't do it justice. Tiny. On a lake. No traffic control in the city.
Somewhere in western Minnesota it flattens out to extremely, unbelievably flat. Ocean-scale flatness. So far, (82 miles) we're seeing that same flatness in North Dakota.
Found one of these in the rest area.
It's immensely long.
A bit wider than one lane.
It has pilot trucks fore and aft.
It was scary to pass because, well, there you are driving and driving and driving and you're still not out in front of it.
Speed limit is 75. To get past it quickly, you're going well over 80.
The Rock Tap Room in Jamestown has a great beer selection but mediocre food.