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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1301votes
(Updated 23 April) Ready to talk biomes and dimensions? Here's how. Pinned
11682votes
Volcano Biome
6033votes
Oasis under review
4926votes
(Dimension) Sky lands under review
4718votes
New Biome Called Cherry Blossom Grove under review
3703votes
A Mangrove forest announced
2977votes
Sandstorms under review
2623votes
Biome: Magic Forest under review
2345votes
(Swamp) Fog under review
2215votes
Giants Biome under review
2068votes
Add natural events to the Nether. under review
1766votes
(May/June 2018) Featured Topic: Underground!
1333votes
Make it rain in savanna biomes so that we can bless the rains down in Africa! under review
1215votes
Dream Biome! under review
1140votes
Waterfall Biomes
1115votes
Dimension: The Abyss
1022votes
Natural Disasters
747votes
Deep Nether
613votes
Better Snowfall
564votes
(Biome) Dead Forests
556votes
Dinosaur Dimension
459votes
luminescent forest
436votes
Swamp Overhaul! (Pictures and Textures Included)
404votes
City Biomes
389votes
Improvements to Rivers
377votes
(Java Parity) Nether should use the full 256 world height.
360votes
(July 2018) Featured Topic: The Swamp
350votes
(Nether Biome) Magma swamp
340votes
Realistic Biome generation