three

I think I've heard of "greener" terrain for the terrain from the original game (that would replace the graphics for normal gameplay). There should be some sort of mod that makes the grasslands greener and the water bluer and the tundra whiter, somewhere. I already have "Snoopy's Terrain", that...

Civ V Wonders: Concept Art

This is a snapshot of the Hoover Dam as part of the GoogleCiv project. This is to differenciate between world and national wonders, and a demonstration of the additional buildings from Civilization III and earlier.