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The deepest free-fall pit in the lower 48 United States, the Fantastic Pit features a staggering 586 feet (179m) drop - a ...

Human beings seem intent on visiting the least inviting corners of the Earth – even the deepest, darkest recesses of cave networks that have remained virtually untouched for thousands of years.

Probing a series of “windows” in the walls of the deepest part of the cave, the team was blocked time and again by sumps or impossibly tight squeezes. But finally, on October 19, Kasjan ...