Secret behind the world's most colourful river

Cano Cristales, located in Columbia, is known as the Liquid Rainbow. Can you guess the secret of its beautiful colours?

Due to the unique chemical composition of its water caused by sedimentation, the river contains no fish.

What it does contain are brightly coloured plants, which can withstand the conditions in the river and grow rich and lush, turning the river bright red, among other colours, depending on the season.

The vivid beauty of the river have led some to call it the world's most beautiful river.


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