Acidalia Planitia is a plain on Mars. It is located between the Tharsis volcanic province and Arabia Terra to the north of Valles Marineris, centered at 46°42′N 338°00′E / 46.7°N 338.0°E. The plain contains the famous Cydonia region at the contact with the heavily cratered highland terrain.
The plain is named after a corresponding albedo feature on a map by Giovanni Schiaparelli, which was in turn named after the mythological fountain of Acidalia.
In popular culture
In the novel The Martian by Andy Weir, the protagonist gets stranded on this plain when a NASA Mars mission goes wrong.