The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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Forest fires move faster uphill than downhill.
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It takes a drop of ocean water more than 1,000 years to circulate around the world.
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The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
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There are more than 50,000 earthquakes throughout the world every year!
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