David Falls is the largest waterfall near Bokara. Below it is an underground cave, where hot air rises all the year round. Water vapor changes colors in the air, and rainbows are often seen. Its name comes from 1961, when a young couple from Switzerland, David, with his beloved girlfriend, went on a hike to Nepal and found the devil's waterfall, which immediately attracted him. At that time, due to the slippery ground, David's girlfriend accidentally fell into the turbulent river. When David saw it, he jumped down to save it. As a result, both of them were swallowed up by the waterfall. In memory of David and his girlfriend who lost their lives here, the waterfall was called David Falls. If we had seen Huangguoshu Falls, then the waterfall would be meaningless. I felt that the story of David was mainly touching.