Where is the world’s longest cave system?
Quick Answer
The world’s longest known cave system is Mammoth Cave in Kentucky, USA. It has been mapped to more than 650 kilometers of passageways.
The Full Story
Mammoth Cave, in Kentucky, is the longest cave system known anywhere in the world. Surveyed passageways now extend to well over 650 kilometers, and exploration continues to reveal new sections. The cave formed in limestone over millions of years and features a vast network of tunnels, sinkholes, and underground rivers. It has long been important to science, recreation, and conservation, and the surrounding area is a UNESCO World Heritage Site and national park. Mammoth Cave is a classic example of how geological dissolution can create immense subterranean landscapes.
Key Facts
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