Mexico City is built on top of an underground resevoir!
47
Israel's Dead Sea is 1,312 feet below sea level.
48
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
Check your map! Virginia extends farther west than West Virginia.
67
The Sahara desert expands at about 1km per month.
90
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
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