Terrain requirements for natural wonders, from xml files

[iammaxhailme]

I got tired of wondering where they are allowed to be so I looked in various xml files (usually features.xml in various places depending on what expasion the wonder is from) to compile a list. Perhaps somebody will want to see it here. I cleaned up some of the tags etc and made it a bit more plain-text. I'm only icluding the relevant tags, for example all the wonders have settlement=false, meaning you can't settle on them. As far as I've noticed, every wonder also is not allowed to be on a tile with river.

Organized by source and then in the order they're listed in the files (which is alphabetical but some are named, mostly "mount" being gone)

Allowed means where the wonder itself is required to be. Adjacent means things it's required (or simply also allowed? Not sure) to be next to. Note that "desert" means flat desert, etc. Hills are a separate type of tile, it'll specify is hills are meant. There is a "not near" tag which a comment in the xml says depends on map size. Not sure how far "not near" is. Oceanic wonders like Galapagos Islands have tags for minimum or maximum distance from land as well. I'm not sure how this works for multi-tile ones; does it apply to each tile, or just one pivot point? Who knows.

Vanilla
Barrier Reef
Allowed: Coast
Not near: Ice
Distance to land: Min 1, Max 1

Cliffs of Dover
Allowed: Plains Hills, Grass Hills

Crater Lake
Allowed: Plains, Tundra, coast

Dead Sea
Allowed: Grass, Desert
NOT Adjacent: Any mountain, coast

Everest
Allowed: (Grass, Plains, Desert, or Tundra) mountain
Adjacent: Everything seems listed. Grass, Plains, Desert, Snow, Tundra, and their hills. Oddly I don't see mountain listed, but I often see Everest being right next to other mountains. Perhaps natural wonders are placed before moutain ranges? Notably these same "everything" is also used for Matterhorn and Zhangye Danxia which I also see right next to mountains a lot even though mountains are not listed as adjacent terrains in any case
NOT adjacent: Coast

Galapagos
Allowed: Coast
Not near: Ice
Distance to land: Min 2, Max 3

Mount Kilimanjaro
Allowed: (Grass, Plains, Desert, or Tundra) mountain
NOT Adjacent: Any mountain, coast

Pantanal
Allowed: Plains, Grass
NOT adjacent: Snow, coast

Piopiotahi
Allowed: Grass, Grass Hill, Plains, Plains Hill

Torres del Paine
Allowed: Grass, Grass Hill, Plains, Plains Hill, Tundra, Tundra Hill
NOT Adjacent: Any mountain, desert, snow, coast

Tsingy de Bemaraha
Allowed: Grass, Grass Hill, Plains, Plains Hill, Tundra, Tundra Hill
NOT adjacent: Coast

Yosemite
Allowed: Plains, Tundra
Adjacent: Forest
NOT adjacent: Coast

Rise and Fall
Delicate Arch
Allowed: Desert, Desert Hill
NOT adjacent: Coast

Eye of the Sahara
Allowed: Desert, Desert Hill
NOT adjacent: Coast

Lake Retba
Allowed: Grass, Plains
NOT adjacent: Coast

Matterhorn
Allowed: Grass Mountain, Plains Mountain
Adjacent: Everything seems listed. Grass, Plains, Desert, Snow, Tundra, and their hills.
NOT adjacent: Coast

Mount Roraima
Allowed: Grass Mountain, Grass Hills, Grass
NOT adjacent: Coast

Ubsunur Hollow
Allowed: Tundra, Tundra Hills
NOT adjacent: Coast

Zhangye Danxia
Allowed: Grass Mountain, Plains Mountain, Desert Mountain
Adjacent: Everything seems listed. Grass, Plains, Desert, Snow, Tundra, and their hills.
NOT adjacent: Coast

Gathering Storm
Chocolate Hills
Allowed: Grass, Grass Hill, Grass Mountain, Plains, Plaisn Hill, Plains Mountain. I have never seen this wonder spawn on a mountain, so I'm a bit confused as to this. I suppose it'll just transform a mountain tile into chocolate hills and it won't remain a mountain.
NOT adjacent: Coast

Gobustan
Allowed: Plains, Plains Hill, Plains Mountain
NOT adjacent: Coast

Ik-Kil
Allowed: Grass, Grass Hill, Plains, Plains Hill
Adjaecnt: Jungle
NOT adjacent: Coast

Mato Tipila
Allowed: (flat and hills of) grass, plains, tundra, desert
NOT adjacent: Coast

Pamukkale
Allowed: Grass, Grass Hill, Plains, Plains Hill, Desert, Desert Hill
NOT adjacent: Coast

Sahara el Beyda
Allowed: Desert, Desert Hills, Desert Mountain
NOT adjacent: Coast

Vesuvius
Allowed: Plain Mountain, Grass Mountain
Adjacent: Same as Everest; all flat and hills listed

DLC
Eyjafjallajokull
In the xml, this is specifically tagged with "CustomPlacement="PLACEMENT_YOSEMITE" so I assume that this recycles a custom placement routine that Yosemite uses, although I'm not sure what that could be. Perhaps it is for the adjacent forest feature requirement?
Allowed: Snow, Snow Hill, Tundra, Tundra Hill
Adjacent: Same as allowed
NOT adjacent: Coast

Lysefjord
Similar to above, Lysefjord is tagged with the custom placement tag for Piopiotahi, so it probably has the same requirements. This is probably something about being one tile on land and one on coast, judging by where it spawns.
Allowed: Tundra, Tundra Hill, Plains, Plains Hill


Giant's Causeway
Giant's Causeway is tagged with its own custom placement tag, but I don't know what it does differernt than Lysefjord/Pioiotahi...
Allowed: Grass, Plains, Coast. This is the only wonder I've seen list coast as a valid tile for it to be on

Uluru
Allowed: Desert, Desert Hill
Not Adjacent: Any mountain, coast, and any hill or flat besides desert.

Ha Long Bay (this one is in \DLC\Indonesia_Khmer\Data\Indonesia_Khmer_GameplayData.xml as there is no features.xml)
Allowed: Coast
Distance to land: Min 1, Max 1
Not near: Ice

Not sure why I bothered to type this all up, it's amazing how much time you have on your hands between turns later in the game on huge maps! Hooray for dual monitors.

 

[iammaxhailme]

Notably I think Vesuvius is the only NW that is allowed but NOT required to be on the coast

 

[Infixo]

No info about it in Civilopedia? (no access to the game atm)