3D Model of Kowloon Walled City
Here is a link to an article about the famed walled city of Kowloon in Hong Kong, which was once the most densely populated place on Earth. This place was demolished in 1993. Previous to 3D rendering technology, this city was hand drawn. 3D rendering technologies like CityEngine make these extruded renderings possible. A perfect recreation of Kowloon was made using 3D software technology. An amazing way to record something that has been destroyed....Here's a link to the recreated city.