China's Forbidden City Built with Giant 'Sliding Stones'

Rather than using the wheel to transport the colossal stones for miles to the palace of China emperors in the 1500s, workers slid the building blocks on slippery paths of wet ice, according to a newfound manuscript.



via LiveScience.com http://www.livescience.com/40924-how-china-forbidden-city-was-built.html