... Polar Polygons on Mars . ... Credit: Malin Space Science Systems , MOC , MGS , JPL , NASA Explanation: What's the best way to the city center? What looks like a street map of some city on Earth is actually a series of naturally-formed fragmented polar polygons on Mars . The existence of polar polygons on Mars is particularly interesting as they may indicate regions where water ice lies within a few meters of the surface. ... Publications with keywords: Mars . ... Victoria Crater on Mars . ...