This blood-red lake outside Iraq's Sadr City garnered a fair share of macabre speculation when it was noticed in 2007. One tipster told the tech blog Boing Boing that he was "told by a friend" that slaughterhouses in Iraq sometimes dump blood into canals. No one has offered an official explanation, but it's more likely that the color comes from sewage, pollution or a water-treatment process.
See Iraq's bloody lake on Google Maps.
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