The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Even Antarctica has an area code. It's 672.
58
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18