Here is a model of the city of London. Its quite low resolution but perfect for filling out a fly-through animation where you need to see a London skyline.
All you need to do is add trees and your own development or high resolution buildings.
You can see by the wire-frames that its quite low polygon.
There are around 60 textures. You can probably remove a few that are not needed for your project.
Most textures are 2k+
This was extracted from a project we worked on.