It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Mexico City is built on top of an underground resevoir!
47
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
Australia's Great Barrier Reef is 1,250 miles long!
45
The Caspian Sea is also classed as the world's largest lake.
52
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119