mammoth cave national park

Noun
  1. A national park in Kentucky having a large cavern and an underground river (synset 108624964)
    is an instance of: national park - a tract of land declared by the national government to be public property
    is a part of: bluegrass state, ken., kentucky, ky - a state in east central United States; a border state during the American Civil War; famous for breeding race horses

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