QUICK FACTSWhere is it? Lake Pueyrredón and Lake Posadas, Argentina [-47.41961002, -71.87622200]What's in the photo? The point where two different-colored lakes meetWho took the photo? An unnamed astronaut on board the International Space StationWhen was it taken? Sept. 15, 2020This eye-catching astronaut photo shows the point where an ancient Patagonian lake has been split by a peculiar land bridge, creating two contrastingly colored bodies of water.Lake Pueyrredón (on the left in the photo) is the Argentine half of a roughly 40-mile-long (65 kilometers) glacial lake, which stretches across the country's border with Chile in Patagonia — a region in South America that is well known for its d...