Memphis Facula (Ganymede)

Ancient capitol of lower kingdom.

Memphis Facula is a palimpsest, or "ghost crater", on Ganymede, the largest of the Jovian satellites. Although almost level today, it is a relic of a massive impact and once was a deep impact crater whose walls have slumped and its floor has risen isostatically, smoothing out the remaining topography with slush. The morphology of the larger palimpsests like Memphis Facula suggests that Ganymede's icy crust at the time of impact was about 10 km thick and was penetrated by the impact, allowing the slush and fluid beneath to fill and level out the crater. (wikipedia entry)

A facula is a bright spot. On Ganymede they are named after places associated with Egyptian myths.