Gargantuan Scale Model of Shanghai in 2020
On the third floor of the Shanghai Urban Planning Museum, there is what probably is the world’s largest scale model of a city. The room-sized model of central Shanghai in 2020, as envisioned by the urban planners, fills an area larger than 100 square meters.
http://www.neatorama.com/2008/08/05/gargantuan-scale-model-of-shanghai-in-2020/