Frame Viking Orbiter 2 n. 421b64 (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)

Caption NASA originale:"Viking 2 Orbiter image of an area near the South Pole of Mars given the name Inca City. This semi-rectangular grid 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. A large ice deposit can be seen towards the South Pole of Mars.