One little issue I have had with Civ IV (and all others) is that mountain ranges are generally useless. But as we know, they create tourism and happiness and all kinds of other things in real life not to mention mining and skiing etc. etc. I noticed in a screen shot that there are mountains with peaks in Civ V and then smaller mountains. I wonder if the developers are "fixing" this misunderstanding about the uselessness of mountains. I also hope we can terraform deserts. We know this is possible.