Can I just say that instead of new ones, I would love it if some of the current structures like jungle temples, desert wells etc. got a facelift? Jungle temples for example are really underwhelming, especially when you compare them to stuff like the bastions.

Perhaps an Overworld fortress, either ruined or with Villagers or with Illagers.

Redwood trees

Maybe something that generates on the new mountains, like a castle or a fortress. Also jungle, swamp, and cherry grove villages.

Pig village

Large trees

Overgrown paths in temperate biomes (ie those with exposed grass/podzol) -Rare lanterns along these trails(maybe also add extinguished/damaged lanterns) Occasional ruined villager buildings (like in the zombie-village structure but stand-alone and potentially half buried) -More likely in biomes where villages don't spawn (make it seem like they're sparse failed settlements, subtle world-building that there aren't villages for that biome)

Ruins. Like zombie villages but no zombies, buildings are partially buried. -Has ruined walls. (subtle worldbuilding that the reason villages don't have walls is that for reasons unknown villager-made walls don't work while golems kinda do)

Rare non-wrecked ships. -A few villagers complete with beds and workstations on a ship modeled after the shipwrecks from the aquatic update. I'd say similar rarity to mycelium islands.

Straight up battle towers. Classic mod feels decent enough for vanilla I'd like to see em