The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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The water of the Antarctica is so cold that nothing can rot there.
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The state with the longest coastline in the Continental U.S. is Michigan.
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The state of Florida is bigger than England!
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Check your map! Virginia extends farther west than West Virginia.
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