[
  {
    "type": "overmap_special",
    "id": "chocolate_bog",
    "overmaps": [ { "point": [ 0, 0, 0 ], "overmap": "pond_swamp_chocolate_north" } ],
    "locations": [ "swamp" ],
    "city_distance": [ 1, -1 ],
    "occurrences": [ 0, 4 ],
    "flags": [ "WILDERNESS" ]
  }
]
