A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Mexico City is built on top of an underground resevoir!
47
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The Sahara desert expands at about 1km per month.
90
Even Antarctica has an area code. It's 672.
58
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14