The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
The Atlantic Ocean is saltier than the Pacific Ocean.
The state with the longest coastline in the Continental U.S. is Michigan.
Europe is the only continent without a desert.
There are more than 50,000 earthquakes throughout the world every year!