Rotomairewhenua: the clearest body of fresh water known to man

Rotomairewhenua, also known as the Blue Lake of New Zealand’s Nelson Lakes National Park, officially holds the title of the clearest lake in the world. Literally translated as the “land of peaceful waters”, Blue Lake is spring fed by the neighboring glacial Lake Constance, and its water passes through a natural debris damn formed a long time ago by a landslide. This debris acts as a natural filter that retains most of the particles suspended in the glacial water, making Blue Lake almost as clear as distilled water. New Zealand’s…

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