The state with the longest coastline in the Continental U.S. is Michigan.
31
The water of the Antarctica is so cold that nothing can rot there.
334
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Check your map! Virginia extends farther west than West Virginia.
67
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40