Game hunting nomads stumbled across this derelict ship, the Ikarus, which crashed hundreds of years ago in a big battle. Decades later it has become a self-sustaining metropolis with an endless power supply from the ship's nuclear reactors.
Things to note. In the far distance is the mother ship, the Daedalus, which also crashed in the same battle. The tiny island in front of the Ikarus is actually fallen debris which developed into a small city. Across from "Debris Island" is an air/sea port which was carved out of the mountain. In the foreground is an outpost of the Ikarus.
Done in pscs2.