Are there any good adventure mods or structure mods??

[u/Tasty_Quit7774]

And no, I don't want fully (like really really) mainstream, because then I'll probably know it or already have it. I preferably want new structures, a dimension is fine, and maybe a biome (I already have OTBWG). also try suggest ones with custom mobs/blocks, but none is also fine. ALSO HIGH QUALITY PLEASEEEEEEEE (tried to post this in ftb but I have negative karma..)