ribbon flowstone formation the cave bacon jewel national monument south dakota |
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| navigate by keyword : cave jewel national calcite flowstone usa travel tourism bacon ribbon strand underground nature stalagmite america tunnel background cavern hole hollow monument park preserve rock sanctuary sightseeing stone stalactite spelunking speleology adventure crystal dark deep shadow exploration gemstone geology illuminated closeup |
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| Ribbon Flowstone Formation, the Cave Bacon in Jewel Cave at Jewel Cave National Monument, South Dakota |
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