사막의 거대한 외계인 두개골 안에서 번성하는 활기찬 도시

An advanced civilization that created its foundations inside a gigantic alien skull. The skull is out in the barren desert, but the skull has a vibrant city with buildings, roadways and spaceports. The city is an oasis in the middle of a barren desert. The image is done in a fantastic science fiction style mixed with the color palette of modern fantasy