Chinese Hakka architecture
Located Fujian Province
These Hakka buildings are found only in the mountainous areas in southwestern Fujian province bordering Guangdong in southern China.
In the 50s, US spy satellites picked up the images of Hakka buildings in southern China, which led the US intelligence to believe that China was in the process of massive buildup of nuclear reactors!
http://en.wikipedia.org/wiki/Fujian_Tulou