Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
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
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
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 Amazon rainforest produces more than 20% the world's oxygen supply.
182