|Google SketchUp - Three dimensional models that are placed on the earth at tour sites.The application for viewing these models and creating your own models is free, and available at the Google SketchUp website.
Unfamiliar with Google SketchUp? This 3D development tool works seamlessly with Google Earth, or as a stand alone application. See a tour and tutorials at What is SketchUp?.
The SketchUp file is editable and the model can be viewed from any angle. The Quicktime Movie offers a three dimensional view of the model, but is not interactive.