Mexico City is built on top of an underground resevoir!
47
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The state with the longest coastline in the Continental U.S. is Michigan.
31
Even Antarctica has an area code. It's 672.
58
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Check your map! Virginia extends farther west than West Virginia.
67