It looks like the next map has some oceanic spots, or at the very least, it looks like the areas would have waves. Which is why I propose using them waves to power two new buildings.
Saw Mill: There would need be a way to drop a log into this building, and one could return later on to find some perfectly sawed boards, in a quantity greater than what a metal saw could provide. It'd be like, a big wooden building with a goofy animation of a saw attached to a horizontal scissor lift, going back and forth over these logs.
Grain Mill: Pretty much the same as above, but this one would take twice as long as hand grinding grain, but would produce a much finer flour. Naturally, this would lead to a higher quality baked good.