Ancient skull city rising from a vast desert planet

A fantastic science fiction art style image of a long forgotten skull in the middle of a vast desert planet that has been overtaken by a species of highly advanced tiny beings that have made a major space port and city out of the protection of the ancient skull. There are building sprawling from the skull and inside the skull are sensors and space ports and all things to make a thriving civilization. Done in a popular science fiction art style with many fantasy accents to enhance the overall mood of the image.