The Niagara Falls moves upstream at an average rate of about 295ft a century!
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
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10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
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The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
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Every year, Alaska has about 5,000 earthquakes.
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Australia's Great Barrier Reef is 1,250 miles long!
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Israel's Dead Sea is 1,312 feet below sea level.
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