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Mammoth Cave National Park, national park containing an extensive system of limestone caverns in west-central Kentucky, U.S. It was designated a World Heritage site in 1981. The park, authorized in 1926 but fully established only on July 1, 1941, occupies a surface area of 83 square miles (215
The World's Longest Cave System Just Got Even Bigger sciencealert.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sciencealert.com Daily Mail and Mail on Sunday newspapers.
Explorers add 8 miles to world's longest known cave system livescience.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from livescience.com Daily Mail and Mail on Sunday newspapers.
New Caverns Discovered in Mammoth Cave National Park backpacker.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from backpacker.com Daily Mail and Mail on Sunday newspapers.