{
  "feature": "minecraft:desert_well",
  "placement": [
    {
      "type": "minecraft:rarity_filter",
      "chance": 1000
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "type": "minecraft:heightmap",
      "heightmap": "MOTION_BLOCKING"
    },
    {
      "type": "minecraft:offset",
      "x": 0,
      "y": -1,
      "z": 0
    },
    {
      "type": "minecraft:block_predicate_filter",
      "predicate": {
        "type": "minecraft:all_of",
        "predicates": [
          {
            "type": "minecraft:matching_blocks",
            "blocks": "minecraft:sand"
          },
          {
            "type": "minecraft:volume_match",
            "match": {
              "type": "minecraft:not",
              "predicate": {
                "type": "minecraft:matching_block_tag",
                "tag": "minecraft:air"
              }
            },
            "max": [
              2,
              -1,
              2
            ],
            "min": [
              -2,
              -2,
              -2
            ]
          }
        ]
      }
    },
    {
      "type": "minecraft:biome"
    }
  ]
}