The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
There are more than 50,000 earthquakes throughout the world every year!
47
More than 25% of the world's forests are in Siberia.
51
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Even Antarctica has an area code. It's 672.
58
The Atlantic Ocean is saltier than the Pacific Ocean.
54
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8