The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Mexico City is built on top of an underground resevoir!
47