4. Pink lake Hillier, Australia
This 600m long lake appears chewing gum pink in color and is on Middle Island which is the largest of the islands and islets that make up the Recherche Archipelago, Western Australia. Pink Lake of Hillier is one of the most favorite places to be visited by air passengers and the reason why it is pink is still not found out although there are many theories suggesting different phenomena.
Image Credit: lh6.ggpht