Mammoth Cave
CountryUSA
RegionKentucky
Discovered4,000 BC
Size/Depth685 km surveyed
About Mammoth Cave
The longest cave system in the world with 685 km of surveyed passages. Named a UNESCO World Heritage Site. Prehistoric Native Americans mined gypsum and other minerals here 4,000 years ago. New passages are still being discovered. Home to 130 species of cave-dwelling organisms.
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