![](http://www.alamy.com/thumbs/6/74AF0038-3E55-4CE0-BE06-61FD874AF43D/2G2EBMC.jpg)
Frostwork and cave popcorn formations in Wind Cave, Wind Cave National Park, South Dakota, USA
Size: 6720px × 4490px
Location: Wind Cave National Park, South Dakota, USA
Photo credit: © Lee Rentz / Alamy / Afripics
License: Royalty Free
Model Released: No
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