Introduction to Tianhe in the cave: The waterfall in the cave is more than 800 meters long, with three layers: upper, middle and lower. This is a section of the cave and is a rare waterfall in the cave. The mountain spring crashes down from the top of the cave, like the Milky Way falling into the cave, which is thrilling. During the rainy season, the water from the Milky Way flows straight down, with the force of thousands of horses galloping. It is known as "Asia's No. 1 Milky Way in a Cave".