Mexico City is built on top of an underground resevoir!
47
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8
More than 25% of the world's forests are in Siberia.
51
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18