When I first saw these pictures of Lake Hillier, a saline (salt) lake located in Middle Island, Western Australia, I thought they were Photoshopped, but they are quite real. I think this lake is fascinating. It looks like it could be on another planet.
Here is a short article I found that describes how it gets its bright pink color (edited and shortened).
In Australia, precisely in Middle Island, there is a lake that can amaze anyone who visit it. The lake is named Lake Hillier. The unique color of the lake is the primary attraction for tourists that come to visit. The pink color is thought to come from the micro-organism Dunaliella salina and Halobacteria, but some say that the pink color caused by red halophilic bacteria in high concentrations salt.
In Australia, Lake Hillier became a favorite destination for tourists. Pink water in Lake Hillier is safe if exposed to human skin. Travelers who come here can play in the water or even swim freely. Because the location of Lake Hillier is in the middle of the wilderness and the size is more than 600 meters, Lake Hillier can only be seen fully from the air. Lake Hillier was discovered in 1802 by British explorer Matthew Flinders. Hillier is not the only one lake that have a pink color in the world. Lake Retba in Senegal also has the same color as Lake Hillier.