Viking 2 Orbiter image of an area near the south pole of Mars given the name Inca City. This semi-rectangular grid (at center-right) is probably the result of wind deflation of deposits revealing the underlying gridded terrain. The individual square cells are about 4 to 5 km across. An ice deposit can be seen at the upper left of the frame, which is to the south. North is at 4:00.
(Viking Orbiter 421B64)
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