a sprawling underwater city on the frozen surface of the moon Europa, where ((massive, domed structures)) create a surreal atmosphere in the depths of the ocean. These structures are bathed in ((bioluminescence)), with sleek ((submarines)) gracefully gliding underneath the surface, revealing ((alien landscapes)) with a mix of ((ice and liquid pools)) that make up the intricate ((sea floor)). The ((ice at the edges of the ocean)) filters the light from the sun, creating a dark blue atmosphere that complements the bright, futuristic environments. The ((intricate details)) of the structures and ((alien creatures)) add a sense of wonder and advanced technology to this underwater metropolis