The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25
The Sahara desert expands at about 1km per month.
90
The state with the longest coastline in the Continental U.S. is Michigan.
31
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109