Have you ever seen that photo of the people standing in that massive underground crystal mine?
Those Gypsum crystals are located 1,000 feet below the Sierra de Naica Mountain in Chihuahua, Mexico. The miners pumped out the cave that was filled with water to reveal the crystals.
The tempature inside that mine was 136 degrees Fahrenheit with a near 100% humidity. Water needed to be constantly pumped out due to the surrounding flood chambers.
Without a special cooling suit, you would die within 10 minutes of heat stroke. If you didn’t die of heatstroke, you would drown to death from the condensation. Miners could only enter with special suits for 20 – 30 minutes at a time.
The cave has since been sealed with water.
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