They just added New Dimensions to Minecraft (1.16 Snapshot Update 20w21a)

Here's a look at the NEW custom dimensions added to Minecraft 1.16. You can now add your own custom worlds and dimensions! This is awesome!PLAY Block Ness Mo

Snapshot 20W21A - Minecraft 1.16 Nether Update - Number 16! Custom

Java Edition 20w14∞ – Minecraft Wiki

Java Edition 1.17/Development versions – Minecraft Wiki

Nether Update – Minecraft Wiki

Java Edition 1.16.2 – Minecraft Wiki

New BASTION DUNGEON! Ruined Nether Portals (Minecraft 1.16

Java Edition 1.20.3 – Minecraft Wiki

Java Edition 22w13oneBlockAtATime – Minecraft Wiki

NEW Infinite Dimensions! APRIL FOOLS Update Minecraft 1.16

i.ytimg.com/vi/L3EDJCA1kPI/maxresdefault.jpg

Java Edition 22w18a – Minecraft Wiki

SOUL SPEED Enchantment! Big Redstone Changes Soon

Java Edition 1.16 – Minecraft Wiki

Java Edition 20w14∞ – Minecraft Wiki