Pink Lake Hillier, Australia: The distinctive color is due not to pollution, but is due to a green alga Dunaliella salina, halobacterium Halobacteria cutirubrum, and/or high concentration of brine prawn. Once the lake water reaches a salinity level great
Las Salinas de Torrevieja, Spain Near the city of Torrevieja in Spain lie two salty and very pink lakes called Las Salinas de Torrevieja. The color is said to be caused by algae that releases a red pigment under certain conditions.
Hutt Lagoon near Port Gregory on Western Australia& Coral Coast is a brilliant effervescent pink - or at least it was the day we visited. I have been chasing pink lakes for a while now and I finally found one which is easily accessible.