Australia's Great Barrier Reef is 1,250 miles long!
45
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Mexico City is built on top of an underground resevoir!
47
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
The state of Florida is bigger than England!
74
Israel's Dead Sea is 1,312 feet below sea level.
48
Every year, Alaska has about 5,000 earthquakes.
31