Photo taken on Nov 28, 2014 shows the scene of the underwater Great Wall located in the Panjiakou reservoir, north China's Hebei province. The underwater Great Wall belongs to the Panjiakou castle which was an important military pass in Ming dynasty about 600 years ago. After the Chinese government built the Panjiakou reservoir in 1975, some parts of the Great Wall were submerged in Panjiakou that made China's unique underwater Great Wall. [Photo/Xinhua]