The city of Zurich published its 50000 detailed 3D buildings as open data
Basically, you can use these data sets to build your own scenes or just have some fun.
“The data catalog is your central entry point for searching and using open data of the city of Zurich.” The data published by the team is available free of charge, and you can also use it for commercial projects.
You have to admit that this is quite awesome. You can get more details here.