The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
In 1850, only 8% of the people in California were women.
0
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
It's still possible to see the division between East and West Germany due to different light bulbs.
5
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119