Please read the pinned post on creating biomes and dimensions. Please put items for the new Mountains and Nether Updates in their proper categories. Remember portals are structures, that includes Nether portals.

Vote for an existing idea or New post

21votes
April Fool's Dimension
20votes
Forgotten biome
20votes
(Nether) Hellshroom Forest Biome
20votes
Nether improvements
20votes
Ether Dimension
20votes
(Java Parity) Nether should use the full 256 world height.
20votes
Underworld Dimension? needs info
20votes
Mythology dimension
20votes
Disorientation dimension (edited)
19votes
(1.16 Nether Update) A New Biome Concept, Deep Lava Ocean/ Lava Rivers
19votes
Boreal forest
19votes
Infected Biome and Irradium
19votes
Better, Tiered Caves
19votes
Add the unused "Mountain Edge" biome
19votes
(Biome) bioluminescent underground mushroom isle/swamplands
19votes
Wastland biome needs info
19votes
Meteor Crater (Biome) (was: A new biome idea)
19votes
"The Mechanical Dimension"
19votes
Krack Biome (was: New Biome!)
19votes
The Mining diemension
18votes
The mystic islands dimension
18votes
Ice Caves
18votes
Biome: Roofed Ocean
18votes
Underground jungles
18votes
Oceanside Cliffs
18votes
River Deltas
18votes
Complete nether overhaul (links enclosed)
18votes
More Storms!: Part 3 Hail
18votes
Have biome transition appear smoother and more “realistic”.
18votes
The Below-World Update (Part 2): Home Fiery Home