For those who dare @MammothCaveNP in #Kentucky is known as the “most haunted natural wonder in the world,” with more than 150 documented paranormal events. Are you brave enough to wonder the dark depth of this cave? #HappyHalloween2018 #FindYourParkpic.twitter.com/0OV1hf9sYn
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8:32 AM - 31 Oct 2018
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