The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
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Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
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The Caspian Sea is also classed as the world's largest lake.
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Check your map! Virginia extends farther west than West Virginia.
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There are more than 50,000 earthquakes throughout the world every year!
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The warmest temperature ever recorded on Antarctica was 3 degrees F.
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The average ice berg weighs 20,000,000 tons!
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