Mexico City is built on top of an underground resevoir!
47
Every year, Alaska has about 5,000 earthquakes.
31
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
The Caspian Sea is also classed as the world's largest lake.
52
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8