A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
It's still possible to see the division between East and West Germany due to different light bulbs.
5
Australia's Great Barrier Reef is 1,250 miles long!
45