Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
The Atlantic Ocean is saltier than the Pacific Ocean.
54
The Sahara desert expands at about 1km per month.
90
Every year, Alaska has about 5,000 earthquakes.
31
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Check your map! Virginia extends farther west than West Virginia.
67
One cubic mile of seawater contains about 50 pounds of gold.
79