Mexico City is built on top of an underground resevoir!
47
Europe is the only continent without a desert.
62
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Australia's Great Barrier Reef is 1,250 miles long!
45
Every year, Alaska has about 5,000 earthquakes.
31
