The Void

The Void is an empty biome that generates only a single structure in Superflat: a 33×33 stone platform with a single block of cobblestone in the center. No mobs (passive or hostile) apart from phantoms can spawn without spawn eggs, spawners or commands. It can be accessed only through The Void superflat preset or Buffet world selection. If generated using Buffet, it generates as if the world has only generated the terrain and hasn't reached the point where it generates biomes. The stone platform still generates, but the cobblestone is at coordinates 8, 3, 8, and as such, it is inside the ground in Surface and Caves buffet worlds. Below the platform, there is just void. This biome can be useful if you want to build redstone contraptions but do not want to have to worry about the ground getting in your way. It can also be useful if you need to build completely custom terrain and want to start from scratch.