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.
17
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
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Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
112
The state of Florida is bigger than England!
74
Israel's Dead Sea is 1,312 feet below sea level.
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