The longest cave in the world with a length of 668 kilometers

For friends who like to travel, they should have seen many kinds of natural karst caves or man-made caves, such as Huanglong Cave in Zhangjiajie, Tenglong Cave in Lichuan, Hubei, and Furong Cave in Chongqing. Bizarre, meandering and full of mystery. In fact, the length of their caves is not long, and they can come out in dozens of minutes at most. But the cave we are going to talk about today has a length of 668 kilometers, which is the longest cave in the world.

This cave is located in the Midwest of Kentucky, United States. Because of the size of the cave, it is named after the ancient mammoth, and it is called "Mammoth Cave". It is the longest known cave system in the world, with a total proven length of 415 miles, or about 668 kilometers. What is this concept? You must know that the distance from Jinan, Shandong to Nanjing, Jiangsu is only about 667 kilometers. It takes more than 7 hours to drive, and the Mammoth Cave is intricate and difficult to explore even on foot.

That is to say, if you want to explore the whole cave and walk 10 hours a day at a speed of 4 kilometers per hour, you may not be able to walk for half a month. Getting lost in the cave is a bad thing. Many people may say that even ordinary people can walk more than 4 kilometers per hour, but you must know that this is in a cave, there is no decent road in it, and you even need to explore carefully, so walking 4 kilometers per hour is ideal.

In fact, it has been discovered a long time ago. As early as more than 5,000 years ago, stories about Mammoth Cave have been circulated, and many traces of the activities of Native Americans have also been found in the cave, but the official discovery and exploration are in In 1791, with more and more exploration adventures, the world's longest cave gradually appeared in front of people, but in fact, at the beginning, the length of this cave was only less than 200 kilometers. The proven length is getting longer and longer.

In 2006, the length of this cave exceeded 600 kilometers, and now it has reached 668 kilometers. Although countless explorers have entered and explored for more than 200 years, this cave is like endless, and new ones can always be discovered. Cave passages, so how long this place is still unknown, but it is certain that there are still many cave passages in the area waiting to be discovered. Of course, this is not a simple cave, and its value may be much greater than imagined.

As early as 1941, Mammoth Cave National Park was established here, covering an area of ​​nearly 21,000 hectares, which can be said to be quite large. It became a World Heritage Site in 1981, and became an International Biosphere Reserve in 1990. Today, it has become a landmark attraction that the local is proud of, attracting a large number of tourists to travel and explore. There are not only various stalactites in the cave, but also small lakes, rivers and waterfalls. The stalagmites in the cave have different shapes. , the scenery is beautiful.

Of course, if you want to enter an adventurous cave tour, you must wear a helmet and protective clothing, and the tour guide will always keep an eye on the tourists to prevent them from getting lost or having an accident. It is such a cave. It has a proven length of 668 meters. If you want to explore it completely, you may not be able to walk for half a month, and the length of the cave is still growing. I don’t know if you have any. Not interested in exploring here?