Australia is home to several stunning pink lakes, with the most famous being Lake Hillier, located on Middle Island off the coast of Western Australia. The lake's vibrant pink colour is caused by the presence of a specific type of algae called Dunaliella salina, which produces a red pigment when exposed to high salinity and sunlight. The striking hue of the lake is a natural phenomenon that has fascinated visitors and scientists alike. While it looks almost surreal, it’s perfectly safe to view (though swimming is not allowed to protect the environment).