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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In 1850, only 8% of the people in California were women.
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The Caspian Sea is also classed as the world's largest lake.
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More than 25% of the world's forests are in Siberia.
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If Manhattan had the same population density as Alaska, there would only be 15 people living there.
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