I played as Siam on a Ring map with Jungle as the dominant terrain, and there were only a few islands in the middle of the central ocean with tundra
terrain. That was where the world's sum total of
three city-states were located (just great for my Siamese UA...) but there was still room for three decent cities which Indonesia could have used to get Nutmeg, Cloves, and Pepper. As usual they only bothered to take one of those sites. Late in the game
I settled one of those tundra islands to get furs to trade. The AI really doesn't know how to use some of the UAs.