There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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The city of Houston, Texas is built on a swamp and is slowly sinking!
89
There are approximately three chickens for every human on Earth.
13
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Mexico City is built on top of an underground resevoir!
47
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The state with the longest coastline in the Continental U.S. is Michigan.
31