A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
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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 Caspian Sea is also classed as the world's largest lake.
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In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
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More than 25% of the world's forests are in Siberia.
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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!
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