The Luoji Ninety-nine Miles Hot Spring Waterfall is located in the Daliang Mountains, Sichuan, China. It is the largest hot spring waterfall in the world. It is formed by dozens of hot springs of different sizes, with a width of more than 200 meters. The biggest feature of this hot spring is that it can not only be viewed, but the water can also be drunk. This hot spring belongs to the rare radon hot spring in the world.