The Google Earth Gallery has a lot of tours you can look at: some are single models, some have cool animations, etc. The latest interesting thing I've found is "guided tours" of certain types of models around the world: bridges, cathedrals, castles, etc.
I particularly like the AIA Tour, which contains a few architecturally interesting models in America. So since I spent all that money on Camtasia Studio, I made a short video on how to use these tours. Enjoy!
These tours are KML files, and they are actually pretty easy to create. Maybe my next video will show you how...
Anyone can create anything in 3D! www.3dvinci.net