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Since 1941 the NSS has been at the forefront of cave science, conservation, and exploration. Join our 8,000+ member community and come caving.

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📷 Stephen Eginoire
Minerals 2 - Dave Bunnell - A passage littered with fallen crusts in a newly discovered lava tube in Hawaii

Since the 90's, The Virtual Cave has provided a definitive visual reference for all things found in caves. Cave formations, also known as speleothems, can take many forms besides the familiar stalagmites and stalactites. See the amazing variety and learn the science behind how speleothems take shape.

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