Australia's Great Barrier Reef is 1,250 miles long!
45
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The Caspian Sea is also classed as the world's largest lake.
52
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
1
Mexico City is built on top of an underground resevoir!
47