The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
It's still possible to see the division between East and West Germany due to different light bulbs.
5
Forest fires move faster uphill than downhill.
52
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18