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Ruby Falls: America’s Hidden Underground Waterfall

Ruby Falls: America’s Hidden Underground Waterfall — "Descend more than 1,100 feet beneath a Tennessee mountain to discover Ruby Falls, a spectacular undergrou…

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Ruby Falls: America’s Hidden Underground Waterfall

"Descend more than 1,100 feet beneath a Tennessee mountain to discover Ruby Falls, a spectacular underground waterfall hidden in darkness for millions of years. Discovered by accident in 1928, it now draws more than 400,000 visitors each year."

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