Cave of Crystals, Naica, Chihuahua, Mexico“Inside the cave, temperatures can reach up to 136°F, with
Cave of Crystals, Naica, Chihuahua, Mexico“Inside the cave, temperatures can reach up to 136°F, with 90 to 99 percent humidity. The air is acidic and there is no natural light. Groundwater laced with calcium sulfate swam into the caves and, heated from magma below, began to form the gigantic assembly of crystals.” - Travel & Leisure -- source link
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