18. Lake Retba, Senegal and Lake Hillier in Australia.
It’s unusual but real. These pink lakes actually exist, and they can be found in Australia. They look like a giant bowl filled with milkshake. Their striking color is attributed to the algae present in the water that produces carotenoids, like the Dunaliella Salina, a type of halophile green micro-algae naturally found in sea salt fields.
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