From afar, this may actually look like Superman’s Fortress of Solitude, but it’s actually a real cave in Mexico. It’s called the Cueva de los Cristales, or Cave of the Crystals, and famous for having the largest natural crystals in the world. Continue reading for our full overview, complete with pictures and a video.


The largest crystal found to date here measures 36-feet in length, 13-feet in diameter, and weighs in at a hefty 55-tons. Inside this cave, explorers deal with temperatures of up to 136-degrees Fahrenheit at 90% – 99% humidity. Without the proper equipment, an average human can only safely be inside this cave for 10-minutes.


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