The Caño Cristales River in the Serranía de la Macarena mountains of Colombia

The Caño Cristales River in the Serranía de la Macarena mountains of Colombia

© Tom Till/Alamy

The Caño Cristales River in the Serranía de la Macarena mountains of Colombia

The Caño Cristales River in the Serranía de la Macarena mountains of Colombia

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