Introduction to underground river rafting: The Gulongshan canyons are connected by underground rivers. It is a rare "Three Gorges and Three Cave" coherent wonder in the world. During the rafting process, "you can fully enjoy the interesting things in the gorge while swimming, and after you swim, you will think about the outside world." . The entire tour passes through several miles of cliffs, ten miles of fountains, hundreds of miles of scrolls, and thousands of miles of caves. You can fully appreciate the original ecological scenery in the canyon.