The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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Israel's Dead Sea is 1,312 feet below sea level.
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There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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The warmest temperature ever recorded on Antarctica was 3 degrees F.
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It's still possible to see the division between East and West Germany due to different light bulbs.
5
Every year, Alaska has about 5,000 earthquakes.
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