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Gruta Lago Azul (Cave of the blue lake)

Gruta Lago Azul (Cave of the blue lake)

In this photo you can see Gary and I in front of the ridiculously blue lake at the bottom of the cave. The intense blue color is due to the extreme purity of the water and the high levels of magnesium in it. The water is very cold, which prohibits anything growing in it, and is supplied by a subterreanean river, so it isn’t contaminated with anything from the surface.

Bonito, Mato Grosso do Sul, Brasil 2008

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