Google has added 3 more 3d city models in Google Earth. They can be found in the 3D Buildings layer of Google Earth. In the post of “Google latlong” Google mentioned that these 3D models are mainly auto-generated and include several user generated 3D buildings.

Currently you can visit several major European cities including Munich, Berlin, Vienna, Zurich, London, etc., virtually and in 3D.

[via: http://google-latlong.blogspot.com/2009/06/more-3d-cities-in-europe.html]