I'm breaking the wiki again and want to know how to fix it, so please don't use that as your source when you answer:
I was calling it "The Wilds" but I think that's because I was confusing it with "The Waste": another short word that starts with "W". Sadly, that's how my brain works.
Is this the "Muddy Biome?" Or is it just the dry side of The Waste? It connects to the Ruins through the Lichen Meadow on one side, to every non-ruins cave biome on all the other sides. Nightmare Werepig lives here as well as groups of slurtle mounds. About half the Light Flowers in the caves are here. There are a couple of Bunnyman hermit homesteads.
I'm also not sure to what degree the Toadstool Arenas are associated with this biome. Are they (or some of them) effectively a set piece within it? There's usually one where an entire room is guano turf, so maybe that one is its own biome?
Also, little rooms of muddy turf seem to be interspersed with other neighboring biomes. Are they still part of this one?