a digital artwork showcasing an advanced, otherworldly cityscape with a circular structure and multiple extensions, set

digital artwork concept art expansive landscape circular structure levels chambers warm light complex cliff crater technologically advanced civilization structures platforms antennae observation decks dusk night vast sky stars extraterrestrial location galaxy dark hues cool tones celestial bodies glows realistic style attention to detail lighting effects immersive environment futuristic water foreground reflections casino exotic interior abstract background texture pattern design colorful creative modern vibrant geometric shapes lines ai generated