The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
Even Antarctica has an area code. It's 672.
There are more than 50,000 earthquakes throughout the world every year!
The Niagara Falls moves upstream at an average rate of about 295ft a century!
The 'King Ranch' in Texas is bigger than the state of Rhode Island.