The Red River Valley is the about the flatest place that I know of. Parts of California (like around Sacramento) are just as flat, but the mountains are always visible in the distance. Likewise, I remember southern Louisiana being very flat, but the plethora of canals and small bodies of water, on the one hand, and the trees and dikes, on the hand, make it seem less flat somehow.
The Agassiz plain of northwestern Minnesota, eastern North Dakota, and south central Manitoba is just plain ol’ flat. And to me, it’s spectacularly beautiful in a weird, expansive, desolate sort of way. More beautiful than the rugged Pacific coast or the mountains or desert. But very hard to capture on film.
