Mammoth Cave National Park, USA

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  • Photo title: Mammoth Cave National Park, USA
  • Author: Jiawangkun
  • Cover photo description:
  • Historic entrance of Mammoth Cave National Park, Kentucky, USA. This national park is also UNESCO World Heritage Site since 1981.
  • Image ID:90468850
  • Views:33
  • Downloads:26

Keywords for Facebook, Twitter and LinkedIn timeline photos

america american biology biosphere cave cavern dark ecosystem entrance exploration falls formation frozen heritage historic historical history hole human indoor inside interior kentucky labyrinth landscape limestone longest mammoth mountain national natural nature niagara old park ranger reserve ridge site state states system tour tourism tourist travel unesco united world
 
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