Give me a Stable Diffusion prompt depicting cover concept art of the lost sand city
cover concept art of the lost sand city, levitating rock piles, golden towers, golden pillars, palm trees, space and time, floating objects, post-processing, in the style of Hugh Ferriss, Behance, Artgerm. High detail, ultra realistic render, octane, 3D, photorealism, symmetric, cinematic from the umbrella academy