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Waterworn limestone of walls 1 mile below mouth of Little Colorado

A man lays sideways on a shelf of sandstone with holes in the formation below him.

Tags: canyons, geological features, limestone

A man lays in a crevasse in a limestone rock wall formation. The formation has holes below where the man is laying.

Tags: canyons, geological features, limestone

A sandstone canyon with a sign visible on the left side that reads "CAVE."

Tags: canyons, cave of the winds, caves, geological features, limestone, williams canyon

Stalagmites in Carlsbad Caverns.

Tags: carlsbad caverns, carlsbad caverns national park, caves, columns, geological formations, hall of giants, humans, limestone, stalactites, stalagmites

Stalagmites and stalactites in Carlsbad Cavern.

Tags: carlsbad caverns, carlsbad caverns national park, caves, columns, geological formations, humans, limestone, stalactites, stalagmites, totem pole formation

Men posing with cave formations in Carlsbad Caverns.

Tags: carlsbad caverns, carlsbad caverns national park, caves, columns, geological formations, humans, limestone, stalactites, stalagmites, twin domes

Men posing with cave formations.

Tags: carlsbad caverns, carlsbad caverns national park, caves, columns, geological formations, humans, limestone, stalactites, stalagmites

Men posing with cave formations in Carlsbad Caverns.

Tags: carlsbad caverns, carlsbad caverns national park, caves, columns, geological formations, humans, limestone, stalactites, stalagmites

Men posing with cave formations in Carlsbad Caverns.

Tags: carlsbad caverns, carlsbad caverns national park, caves, columns, geological formations, humans, limestone, stalactites, stalagmites

A group of people sitting in rocks below large cave formations in Carlsbad Caverns

Tags: carlsbad caverns, carlsbad caverns national park, caves, columns, geological formations, hall of giants, humans, limestone, stalactites, stalagmites

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