>>537005854
>but I don't know how recognizable mountains are in your world
It's quite a mess of hills and mountains to be honest but it looks cool. I made all the wooded biomes (forests, birch, taiga, jungle, dark/pale oak, mangrove swamp etc) into badlands biomes and none of them spawn ancient cities naturally, but I also added cherry and regular groves to that list because they're also wooded however they do spawn ancient cities below them. I did happen to make all other genuine mountain biomes (snowy slopes, jagged/frozen/stony peaks, meadows, etc) into eroded badlands so hopefully if I go and check that biome out whenever I see one that's large enough just maybe I'll be hit with some luck