I mean all the unnatural, wireframe-like features. It's a fascinating design and I was hoping that some quests would elaborate on the lore of how that area came to be like that. I'm caught up on the archon quests and have just finished Nightingale's Song... not a word so far.
Is there a world quest that at least mentions it? Or was there some limited event that I missed?
My personal hypothesis, before finishing the archon quests, was...
...that Dottore was trying to use the power of the moons (essentially Nibelung's authority) to actually reshape the world and create new land, separate from Teyvat, by weaving kuuvahki into tangible matter, and interrupting the process resulted in that half-finished, low-poly look.
Obviously things didn't turn out like that, and I'd love to know if any quest touches on the topic, because the wacky geometry is just way too cool of a detail to just drop and never elaborate.