Canada and Russia can build Mountain Hamlet improvement on the tundra mountain tiles (other civilizations can build it only if the tundra mountain tile has sheeps).

Petra wonder bonus yields also added to desert mountain tiles.

Inca mountain production bonus instead of +2 Production now gives +1 Production and additional +1 Production only if the mountain tile has no features, improvements, or visible resources (see details about why this nerf is needed in the comments section).

Added a new builder unit operation: Remove Adjacent Improvement so now it is possible to remove mountain improvements (it should also work on any improvement) but due to the limited game API this operation will consume a builder unit no matter of how many build charges it had.

AI for some reason could not build new buildings and Anchorite Hovel improvements so it will be gifted with some eventually if it has met all requirements.

I'm not an artist so there are some icons missing and some icons were reused from the existing ones.

Mod is using the functions provided by the Gathering Storm API so it could not be used without GS expansion (nothing I can do here).