The world's largest Tiankeng Wulong Tiankeng Scenic Area covers an area of 38 square kilometers.

Tiankeng is a geographical phenomenon. There are many large and small sinkholes in the world. Today, the Wulong sinkhole is introduced, which can be said to be the largest sinkhole in the world and the only sinkhole group eroded by surface water in the world. Wulong Houping Tiankeng Group is located in the southeast of Chongqing, with a scenic area of 38 square kilometers. In 2007, it was listed in the World Natural Heritage List.

Introduction to the Tiankeng Group in Houping, Wulong, Chongqing, with a scenic area of 38 square kilometers, it can be said that it is the largest tiankeng in the world. Wulong Tiankeng Group is the only Tiankeng Group eroded by surface water in the world. The sinkhole was formed because it was washed away by water for a long time, and the formation time was about 2 million to 2.3 million years.

Around this sinkhole, there are three or four rivers with very large water volume. This kind of river with super water source and hydrodynamic force has very strong erosion and dissolution ability. Under the long-term erosion and collapse of these rivers, the holes are getting bigger and deeper, and gradually formed a large sinkhole group of this scale.

The Houping Tiankeng Group in Wulong is well preserved, and the shape of the Qingkou Tiankeng is also perfect. It can reach the bottom of the Tiankeng through the 3000-meter-long Erwang Cave, which is rare in the world. In the upper part of the sinkhole, there are some spectacular waterfalls, which converge into rivers, flow into Erwang Cave to form groundwater, and then gush out from Mawan Cave.

For thousands of years, the Houping Tiankeng Group in Wulong has been regarded by local people. Deep pit? Because it can predict the weather. Whenever there is fog in the sinkhole, it means that it will rain heavily soon. Later, according to experts' investigation and analysis, this is probably because whenever it rains, the temperature outside the cave becomes higher or the air pressure changes, it will press down into the cave.

The cave is a constant temperature environment, and the downward pressure will form fog at the entrance of the cave, so the saying that the fog in the sinkhole indicates rain is produced. This sinkhole is a classic of karst geology and landform in southern China. Some experts point out that it may contain many precious wild animals. The scenery of the tiankeng is very beautiful. You must go and see it when you have the chance.