China's Ghost Cities

Just why are they building these homes?  64 million empty?  Isn't that the population of Mars? 

These amazing satellite images show sprawling cities built in remote parts of China that have been left completely abandoned, sometimes years after their construction. Elaborate public buildings and open spaces are completely unused, with the exception of a few government vehicles near communist authority offices.

Some estimates put the number of empty homes at as many as 64 million, with up to 20 new cities being built every year in the country's vast swathes of free land. The photographs have emerged as a Chinese government think tank warns that the country's real estate bubble is getting worse, with property prices in major cities overvalued by as much as 70 per cent.