A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
The Sahara desert expands at about 1km per month.
90
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8
Australia's Great Barrier Reef is 1,250 miles long!
45