A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
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The Caspian Sea is also classed as the world's largest lake.
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Every year, Alaska has about 5,000 earthquakes.
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The state of Florida is bigger than England!
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Australia's Great Barrier Reef is 1,250 miles long!
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
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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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