Gansu, a northwest province of the People’s Republic of China, lies between Qinghai, Inner Mongolia, and the Huangtu Plateaus, The Yellow River also flows straight through Lanzhou, the capital of the province and gets most of its water from Gansu. The landscape in Gansu is very mountainous in the south and flat in the north. Major tourist attractions include The Jiayuguan Pass of the Great Wall, is the largest and most intact pass, or entrance, of the Great Wall”, and having a single brick on the top; Mogao Grottoes, near Dunhuang which represents an astonishing collection of Buddhist art and religion; and Silk Road And Dunhuang City, the historic Silk Road starts in Chang'an and goes to Constantinople, and merchants can get fresh camels, food and guards for the journey in Dunhaung.