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
Every year, Alaska has about 5,000 earthquakes.
31
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
The city of Houston, Texas is built on a swamp and is slowly sinking!
89