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Mammoth Cave National Park
Mammoth Cave National Park
is a
U.S. national park
in central
Kentucky
, encompassing portions of Mammoth Cave, the
longest cave system known in the world
. The official name of the system is the Mammoth-Flint Ridge Cave System for the ridge under which the cave has formed. The park was established as a
national park
on July 1, 1941. It became a
World Heritage Site
on October 27, 1981, and an international
Biosphere Reserve
on September 26, 1990.
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