[
  {
    "type": "overmap_special",
    "id": "Toxic Waste Dump",
    "overmaps": [ { "point": [ 0, 0, 0 ], "overmap": "toxic_dump_north" } ],
    "locations": [ "land" ],
    "city_distance": [ 15, -1 ],
    "city_sizes": [ 0, 12 ],
    "occurrences": [ 0, 1 ],
    "flags": [ "CLASSIC" ]
  }
]
