It’s even stranger than that.
There are a fair few trees here. But most of them aren’t natural, they were planted. Planted in perfectly straight, compass-axis lines that run for about a kilometer each, slicing the plain into a giant square checker pattern.
in my mind that’s still forest, it’s not like most of europe’s forests are in any way natural at this point, any time you see a forest here in sweden that has a suspicious amount of oaks of the same age that’s probably a forest intended to provide lumber for ships a couple hundred years ago.
I could be wrong, but it sounds like the trees form lines on a grid with no trees in the middle. Kinda like if you went insane and put trees every 10 lines in cities skylines. I wouldn’t consider that a park, much less a forest.
Where I grew up in nd tree lines were more for wind breaks than described here.
Here’s a bit a little south of Mandan, https://maps.app.goo.gl/fkns9wFp8NsnCvFy9
Trees don’t really do well around here. And bear in mind this is the more woodsy part of nd. Past this it’s mostly grasslands even more.