There's a fairly simplistic model of the Three Gorges Dam created by SugarSmax up on the Google 3D Warehouse. It can be downloaded into Google Sketchup or Google Earth and viewed from any angle, but it does give a nice idea of how the Chinese landscape has been modified by such a massive construction as this dam.
To aid in your Google Earth navigation, I still HEARTILY recommend the "3Dconnexion SpaceNavigator" from 3DConnexion. It's remarkably affordable, and brings the whole Google Earth experience to life. Lots of fun!
Try flying around the Last Chance To See locations which you'll find in our Another Chance To See KMZ file, and also the Jane Goodall Chimpanzee Google Earth blog which is a very clever use of Google Earth. The Space Navigator brings so much to the whole experience, and it's thoroughly addictive! The device is not just for Google Earth though. It also works with Google Sketchup, Autodesk products, and much more besides. I highly recommend it.