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mexico's cave of giant crystals. outstanding. PBS did a special on these crystals. They are huge.

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The Giant Crystal Cave in Mexico under Naica Mountain.

Crystal Cave Mexico share on facebook | The Giant Crystal Cave in Mexico under Naica Mountain.

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101 Most Beautiful Places To Visit Before You Die! (Part I)

Lu Di Yan, The Reed Flute Cave is a landmark and tourist attraction in Guilin, Guangxi, China St.Michael's Cave, is a cave system in the British Overseas Territory of Gibraltar Crystal Cave - Svínafellsjökull in Skaftafell, Iceland The Cave...

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The cave of crystals in Naica mountain at the Chihuahuan Desert - Mexico's Cave of Crystals contains some of the world's largest known natural crystals—translucent beams of gypsum as long as 36 feet (11 meters). A new study says the gems reached their vast sizes thanks to a peculiar combination of consistent volcanic heat and a rich watery mixture.

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Crystal Caves, Bermuda. Lake underneath a cave - you can see to the bottom the water is so clear.

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Take A Tour Through Kutztown's Crystal Cave

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23 of the world’s most insane caves that you can explore [PICs]

The Cyrstal Cave in Bermuda. Check out 23 of the world's most insane caves that you can explore. MatadorNetwork.com

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