A hyper realistic depiction of an alien city in the shape of a large ring, floating above a snow and ice field with nebulae and stars in the background. The scene showcases high detail and cinematic lighting, evoking a sense of grandeur and mystery with an epic sci-fi atmosphere. Surrounding the city are dark structures and glowing lights, along with icebergs and metal buildings, all contributing to a dark-toned, unreal engine stylized environment that feels inspired by sci-fi elements like the Warhammer40k series.