4. Hutt Lagoon, Australia

Hutt Lagoon is one of the most unusual pink lakes in the world, known for its remarkable ability to change colors throughout the day, shifting between vivid pink, lilac, and even deep purple hues. This striking color-changing phenomenon is caused by the presence of carotenoid-producing algae, Dunaliella salina, combined with unique geological factors that influence light reflection and absorption. The lagoon's bed consists of a special type of gypsum crust that enhances the color variations, making it the only pink lake in the world with such dramatic transitions. Stretching over 14 kilometers along Western Australia's Coral Coast, Hutt Lagoon is the largest natural beta-carotene production site in the world. Scientists attribute the lake's unique color-changing properties to its distinct geological composition, which includes rare mineral deposits and a unique underground water system.
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