Please read the pinned post on creating new biomes and dimensions. Remember that individual items, mobs, and structures should still go in their own categories - this is not a category for entire updates.

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1283votes
(Updated 23 April) Ready to talk biomes and dimensions? Here's how. Pinned
400votes
City Biomes
334votes
Realistic Biome generation
68votes
Better lakes and rivers
0votes
Virga
6votes
Mangrove Swamp Ideas (1.19 Ideas)
129votes
Willow trees
2votes
New secret achievement and new mode
2votes
Revamped Forests and Plants in 1.19
0votes
Mushroom Island Rework
1vote
mushroom end forrest
362votes
(Java Parity) Nether should use the full 256 world height.
3votes
improved witch hut
1vote
Flipside Dimension
3votes
Canyon Biome
0votes
Mossy Endstone
4votes
Cherry Tree Forest
0votes
King game 7077
4votes
Mystic forest biome
2votes
Illager fottress
6votes
More End Biomes
3votes
The Darkness Dimension
3votes
more Biomes and dimensions
2votes
Overlaying biomes
8votes
More ruined structures
26votes
Jungle update
2votes
Biome exclusive items
12votes
palm trees and new tropical biome
2votes
Clearing Biomes
11542votes
Volcano Biome