What's the highest possible adjacency bonus?

[evonannoredars]

I realised recently mountain wonders provide double adjacency bonuses to culture/happiness buildings, since they're both wonders and mountains. Hoerikwaggo is especially powerful as it alone can give a +6 adjacency to a building in the right spot, which got me thinking - what's the highest possible adjacency you can get?

I assume the game automatically sorta evenly distributes wonders somehow, so two next to each other is unlikely. But Hoerikwaggo (+6), a tropical mountain with Macchu Pikchu (+2) and mountains or wonders in the two remaining adjacent tiles (+2) could result in a +10 adjacency.

Is there anything that could get a higher adjacency, for any kind of building?

 

[Yzman]

As Isabella when I was putting happiness buildings near a mountain wonder I think it gave me 23 happiness...

 

[Menocchio]

If you have a coastal island surrounded by water tiles, you can get +6 adjacency for Food and Gold buildings; wonders that can be placed on water, like the Colossus and Statue of Liberty, effectively double the adjacency bonus of their tile (from +1 to +2), giving +7-8 total.

Alternatively, Meiji Japan gets a tradition card that gives Military buildings an adjacency from water tiles—so you could place one of those on that same island and it'd be even higher if there are sea resources adjacent to the island. There are also some other adjacency bonus traditions that could contribute to really high numbers, but I've forgotten most of them besides the Abbasids' adjacency bonus for all buildings with the Palace/City Hall and Nepal's adjacency to Food and Science buildings from mountains. Theoretically you could double that on Food with Pachacuti? It'd still just be food though, not a hard-to-get yield.

 

[Krikkit1]

If you have a coastal island surrounded by water tiles, you can get +6 adjacency for Food and Gold buildings; wonders that can be placed on water, like the Colossus and Statue of Liberty, effectively double the adjacency bonus of their tile (from +1 to +2), giving +7-8 total.

Alternatively, Meiji Japan gets a tradition card that gives Military buildings an adjacency from water tiles—so you could place one of those on that same island and it'd be even higher if there are sea resources adjacent to the island. There are also some other adjacency bonus traditions that could contribute to really high numbers, but I've forgotten most of them besides the Abbasids' adjacency bonus for all buildings with the Palace/City Hall and Nepal's adjacency to Food and Science buildings from mountains. Theoretically you could double that on Food with Pachacuti? It'd still just be food though, not a hard-to-get yield.

Macchu Pichu give buildings next to it 8 adjacency (4 culture and 4 gold).
Put that next to a Happiness building surrounded by Wonders or mountains and you have 15 adjacency
5 from the regular Wonder/mountains
2 from MP because it’s a Wonder and a mountain
8 from MP itself

 

[Banazir864]

Unless I'm misunderstanding the mechanics, a Madrasa owned by Charlemagne and surrounded by 12 science buildings (some of which might be in neighboring cities) would have an adjacency of 24.

+12 Science from its own adjacency for science buildings
+6 Science from its own adjacency for quarters
+6 Happiness from the adjacency for quarters that Charlemagne gives science buildings

 

[Menocchio]

I think the idea in the first place is finding high single-yield adjacencies, so just one of Science, Production, Happiness, etc. rather than highest total yield adjacency. There's also an attribute unlock for Scientific leaders that gives +1 to Science, Production, and Gold building adjacencies, but I've honestly never levelled up any Scientific leader far enough to try it out, so I have no idea how it functions.