In The - This (along with so many innumerable reasons) is why the rain forests are so important. We are destroying so much of our world that we could lose things like this in our lifetime. That's too fast for the Earth to compensate.
Lake Retba, Senegal (western Africa) Can't believe I had never even heard of this! (Lac Rose/the Pink Lake!) The pink color is from a bacteria that grows in the lake due to it's extremely high salt content.