Archipelago/worlds/pokemon_emerald/data/regions/unused/dungeons.json

{
  "REGION_ALTERING_CAVE/MAIN": {
    "parent_map": "MAP_ALTERING_CAVE",
    "has_grass": true,
    "has_water": false,
    "has_fishing": false,
    "locations": [],
    "events": [],
    "exits": [],
    "warps": [
      "MAP_ALTERING_CAVE:0/MAP_ROUTE103:0"
    ]
  }
}