A section of Great Wall built in Ming dynasty (1368-1644) twists on cliff along the Yellow River in Laoniuwan geopark in Hohhot, north China's Inner Mongolia Autonomous Region, July 16, 2013. The Great Wall meets the Yellow River in Laoniuwan, which was turned into a geopark in December of 2012 and opened to the public on July 16, 2013.(Xinhua/Jin Yu)