I must be doing something wrong, please help

So that is supposed to be Devil’s Tower in WY, USA. I’ve seen videos of flyby’s in MSFS2020 on youtube and it looks great. I
I’ve cranked the graphics to ultra and that is what I get. Any ideas?

I believe there is custom scenery for that. This is maybe what you’ve seen: https://tinyurl.com/yxjll52c


Thanks, this makes sense now.