World Geography

Which of these does "75,000 gallons of water flowing over each second" best describe?

More Questions from World Geography
Which one of these is not a real country?
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Which country is not in South America?
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Which country's highest elevation point is Paektu-san 2,744 meters and is located in Asia?
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Which country has this flag?
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Where is the city of Rio de Janeiro located?
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Which island is not part of the Greater Antilles?
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Which country's highest elevation point is Halla-san 1,950 meters and is located in Asia?
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An archipelago of 169 Pacific islands known as the "Friendly Islands", Tonga has what capital city?
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