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Lake Hillier, Australia
This saline lake, located on the tip of Middle Island in Western Australia, is famous for its pink hue. “Say, fellas. Who dumped all that Pepto Bismol into the lake?” you ask because you’re clever and figure nobody has ever made that joke before. It actually gets its color from — you guessed it — algae! It’s called Dunaliella salina for all you science and/or Latin buffs out there.