It looks like the atlantic, a long time ago...
IDK, but it is certainly in a higher latitude area (presumably north).
A lake on Titan, moon of Saturn.
Lake Vostok, with the South Pole flipped to the top of the picture.
I see that there was no need to flip the picture:Lake Vostok placement
Daniel McCarthy is correct - it's a lake with its river system on Titan. Looks like a neat place to kayak.
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Daniel Kuehn is a doctoral candidate and adjunct professor in the Economics Department at American University. He has a master's degree in public policy from George Washington University.