If you haven't checked it out yet I also recommend for the more technical reader to check out the brief history of Cyrodiil. This way you can see how a game world takes shape from a more technical aspect.
It's amazing the detail that this team has brought into the world. From the simplicity of leaves to the detail of a "very furry cow" it's incredible to see a video game with such scope. Although what else would you expect from Bethesda? I recommend listening to the podcasts for these developer series, for a wealth of information and a very informative view on what makes this game tick.
Check out the brief world video below.
Each one of these videos makes me want this game even more. I'm ready Bethesda, take my money and give me dragons! Remember that all these videos and podcasts can be found over at the Elder Scrolls Community site here.