The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
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 names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
Forest fires move faster uphill than downhill.
52
Australia's Great Barrier Reef is 1,250 miles long!
45
Israel's Dead Sea is 1,312 feet below sea level.
48
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
It's still possible to see the division between East and West Germany due to different light bulbs.
5