It might be a westerly direction; it's been a while since I played civ regularly and I just got back into it, so I don't remember exactly. And the terrain part in the previous quote box, I've noticed that in MGE at least, hitting transform again on the weirded out terrain undoes it, but with a side-effect of adding a river tile to it. At first, I was like "wtf", but considering I've tweaked the rules in some of my scenarios to allow terrain transforms to go full circle with specific combinations of all three transform methods (mining, irrigation and transform; and leaving room for farmable and/or minable lands of course), I realized I could exploit this bug for full-scale, in-game geo-engineering, literally reshaping entire planets -- including coastlines and rivers! Sadly, I think it results in an entirely new bug -- river tiles floating on top of ocean tiles. Slightly annoying, yeah, but also a little bit funny.