Introduction to Miao Hall: Miao Hall is located 7.8 kilometers inside Yanzi Cave. It was discovered by cave experts from China and France in 1989. It was named "Miao Hall" because there is a Miao village nearby. About 500 meters from the entrance of the cave, the cave is about 700 meters long, 215 meters wide, and 70 meters high on average. It covers an area of 120,000 square meters and has a volume of more than 7 million cubic meters. It is the second largest karst cave hall in the world.
The cave is full of stalagmites, stone pillars, stone curtains, etc. There is a huge 38-meter-high stalagmite in the northwest of the hall, which is really rare. At present, there are 6 branch holes in the Miao Hall that have not yet been discovered. During the flood season, the flood will pass through the hall and pour down from the rocks, forming a multi-level underground river waterfall group, which is quite spectacular.