Subterranean architecture, underground city, futuristic, high-tech, sleek metal walls, neon lights, holographic advertisements, bustling streets, pedestrian tunnels, escalators, grand central hub, vaulted ceilings, intricate pipework, steam punk elements, dimly lit corridors, atmospheric fog, misty ambiance, distant humming machinery, massive crystal formations, glowing luminescent mushrooms, abandoned subway tunnels, rusty industrial pipes, eerie shadows, cinematic composition, dramatic lighting, 3/4 perspective.