Bottomless Pit

{
  "biome": "minecraft:plains",
  "lakes": false,
  "features": false,
  "decoration": false,
  "layers": [
    {
      "block": "minecraft:cobblestone",
      "height": 2
    },
    {
      "block": "minecraft:dirt",
      "height": 3
    },
    {
      "block": "minecraft:grass_block",
      "height": 1
    }
  ],
  "structure_overrides": ["minecraft:villages"]
}