Popcorn formation, Wind Cave National Park, South Dakota

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Size: 5111px × 3678px
Location: Wind Cave National Park, South Dakota
Photo credit: © Clint Farlinger / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: america, black, cave, cavern, caving, dakota, formation, hills, national, natural, nature, north, park, popcorn, south, speleothem, spelunk, spelunking, underground, wind