A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Every year, Alaska has about 5,000 earthquakes.
31
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
One cubic mile of seawater contains about 50 pounds of gold.
79
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119