This five-story, blood-red waterfall which pours out of the Taylor Glacier located in Antarctica's McMurdo Dry Valleys was first discovered back in 1911. Originally they thought the red color was algal reaction but it turned out to be much more interesting. Many many years ago, the Taylor Glacier had covered a small body of water that contained an ancient community of microbes. There, buried beneath the glacier, they evolved independently of the outside world. This primordial cocktail has made the lake rich with iron, which gives the waterfall this amazing red color.
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Photo from eurekalert.org