What is the world’s longest known cave system?

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1What is the world’s longest known cave system?
After the channel connecting Sistema Dos Ojos with Sistema Sac Atun was discovered, this cave system became known as the largest underwater cave in existence. 2 Mammoth Cave, Kentucky It’s unknown how far Mammoth Cave actually extends, but to date, it has been recorded that the underground system stretched at least 365 miles .
https://www.thetravel.com/caves-largest-ranked-size/

2What is the world’s longest known cave system?
Mammoth Cave, the world’s longest known cave system This List of longest caves includes caves in which the combined length of documented passageways exceeds 200 km . In some of these caves, passageways are still being discovered.
https://en.wikipedia.org/wiki/List_of_longest_caves

3What is the world’s longest known cave system?
Located just miles from the Mexican village of Tulum, the Sistema Sac Actun is the second-longest known underwater cave system in the world; over 130 miles of it have been explored so far.
https://www.smithsonianmag.com/travel/biggest-longest-five-amazing-caves-visit-180952892/

4What is the world’s longest known cave system?
Mammoth Cave, Kentucky – The United States is home to the world’s longest known cave system. Mammoth Cave in west-central Kentucky has more than 412 miles of surveyed passageways, and there may be quite a lot more — scientists estimate the cave stretches about 1,000 total miles.
https://www.try3steps.com/2020/08/answer-what-is-worlds-longest-known.html

5What is the world’s longest known cave system?
If the largest caves are those with the largest chambers, then there is a clear winner. The cave with the largest chamber is the Son Doong cave in on the Laotian-Vietnamese border. The largest chamer in the Son Doong cave system is about 3.1 miles (about 5 km) long, about 492 feet (150 m) wide, and about 656 feet (200 m) tall.
https://www.wisegeek.com/what-are-the-largest-caves-in-the-world.htm

6What is the world’s longest known cave system?
This is the “worlds longest known cave system” with over 400 miles of passageways. This cave goes on and on. The tours go into just a small part of the whole system. Cave tours vary from the long difficult tour to the short easy tour. The massive museum has very detailed information about Mammoth Cave and caves in general.
https://www.tripadvisor.com/ShowUserReviews-g143043-d146944-r752219227-Mammoth_Cave-Mammoth_Cave_National_Park_Kentucky.html

7What is the world’s longest known cave system?
Thanks to discoveries made during a recent expedition, the world’s largest cave, Vietnam’s Son Doong, appears to be even bigger than previously thought. Find out how much larger we now think it is.
https://www.cnn.com/travel/article/son-doong-cave-vietnam-expedition/index.html

8What is the world’s longest known cave system?
It is the largest known cave passage in the world by volume. Its name, Hang Sơn Đoòng, is variously translated from Vietnamese as ‘cave of the mountain river’ or ‘cave of mountains behind Đoòng [village]’. [disputed – discuss] As a solutional cave, it was formed in soluble limestone and is believed to be between 2 and 5 million years old.
https://en.wikipedia.org/wiki/Hang_S%C6%A1n_%C4%90o%C3%B2ng

9What is the world’s longest known cave system?
Source: wikimedia.org Located just north of Tulum, this gorgeous cave system was found to be the largest underwater cave in the world after the discovery of a channel that connected the underwater cave Sistema Sac Atun and the flooded Sistema Dos Ojos. Due to ongoing discoveries in both this system and Sistema Ox Bel Ha, the competition for this title continues.
https://largest.org/nature/caves/

10What is the world’s longest known cave system?
The longest cave in the world is the Mammoth Cave, which measures 405 miles in length and is found in Kentucky, United States. Here are some other amazing caves. Longest Caves in the World Mammoth Cave. By far, the longest cave in the world is the Mammoth Cave in Brownsville, Kentucky, US. This cave is a staggering 405 miles in length.
https://www.worldatlas.com/articles/the-longest-caves-in-the-world.html

News results

1Where Is The World’s Largest Underground Lake?
The Dragon’s Breath cave is the largest non subglacial lake in the world. It was discovered in 1986 by the South African Speleological Association.
https://www.worldatlas.com/articles/where-is-the-world-s-largest-underground-lake.html
Published Date: 2020-08-17T08:00:00.0000000Z

BING based on video search results

1  🇲🇽 World’s longest underwater cave found in Mexico
What is thought to be the world’s largest underwater cave has been discovered off the eastern coast of Mexico in the Yucatan Peninsula – and it is around 350km-long. A team of archaeological divers found human bones and pottery from thousands of years ago. Scientists are hoping the discovery could help piece together a clearer understanding of …
Watch Video: https://www.youtube.com/watch?v=BH81cv7pJZM

Wikipedia based search results

1List of longest caves
This List of longest caves includes caves in which the combined length of documented passageways exceeds 200 km. In some of these caves, passageways are…
https://en.wikipedia.org/wiki/List of longest caves

2Caves of Meghalaya
amongst the longest caves in the world. Of the ten longest and deepest caves in India, the first nine are in Meghalaya, while the tenth is in Mizoram. The longest…
https://en.wikipedia.org/wiki/Caves of Meghalaya

3Hellhole (cave)
Hellhole is a large and deep pit cave in Germany Valley, eastern West Virginia. It is the 7th longest cave in the United States and is home to almost…
https://en.wikipedia.org/wiki/Hellhole (cave)