Tonglu's Chuiyun Tongtian River and Yaolin fairyland have their own characteristics. Tongtian River is characterized by karst caves in underground rivers. By boat into the cave, nature's ghost axes and magic craftsmanship shaped various forms of stalactites, such as waterfalls, the underwater world and so on, with colors of rainbows and so on. The Tongtian River leads directly to the underground Grand Canyon, but to buy tickets separately, the area of the Grand Canyon is larger than that of the Tongtian River. It is suggested that we go to the Grand Canyon for more time.