Ramble along the ancient Silk Road and re-enter the historic long river. Located in the upper reaches of the Yellow River, northwest China, Gansu is one of the cradles of Chinese cultures, according to Travel China Guide. The province is abundantly gifted with cultural relics and natural scenery. The Danxia landforms, located in the Zhangye Danxia National Geological Park, are the known as the eye candy of Zhangye. The rocks and cliffs come in a variety of formations — smooth, sharp, vibrant and extremely tall. The colorful rocks and rainbow ridges are absolutely awe-inspiring.