If we're going to be getting some spiders and water monsters (late game with lots of pollution), I'd say it would be awesome if we could get a way to artificially dig water trenches and build cliffs. This would require lots of science of course in order to ensure at that time in the game you're also producing enough pollution to spawn swimming and spider monsters. Not sure what it would require to dig a trench or build a cliff that would make "some" sense.
I'm imagining late game where bases are built on top of high mountains made out of cliffs and surrounded by moats
