There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The state with the longest coastline in the Continental U.S. is Michigan.
31
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.
1
The Atlantic Ocean is saltier than the Pacific Ocean.
54