Where is the famous Cave of the Crystals?

in Switzerland
in USA
in Mexico
in South Africa
The cave near Naica, Mexico, was discovered in 2000 by miners. At that time, it was completely submerged. Today, the cave is accessible because the mining company's pumping operations keep it clear of water. Unfortunately, the crystals deteriorate in air, and soon may be lost.
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flagMexico
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5%
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flagItaly
6%
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8%
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flagFrance
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72%
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flagthe Philippines
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flagRepublic of Ireland
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flagAustralia
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flagPakistan
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flagSwitzerland
13%
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flagGermany
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flagGreece
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30%
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flagthe United States
16%
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flagthe United Kingdom
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flagCanada
11%
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flagBelarus
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flagAustria
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flagthe Netherlands
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flagIndia
27%
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flagRussia
10%
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flagPoland
15%
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flagUkraine
22%
22%
27%
26%
315