People are standing in a cave with a large rock formation

A post-apocalyptic underground city, built to shelter humanity after a devastating disaster rendered the surface uninhabitable. The atmosphere is both haunting and mesmerizing, blending despair and resilience. The setting is illuminated by bioluminescent fungi and artificial neon lights, casting eerie glows on massive steel and stone structures. Gigantic caverns house a labyrinth of interconnected tunnels, with suspended walkways and platforms crisscrossing the void. The architecture is a mix of futuristic technology and repurposed industrial remnants, with towering columns supporting the weight of the collapsed surface above. People move about in survival gear, their faces etched with determination, while autonomous drones and robots maintain essential systems. The air is thick with moisture and the hum of machinery, as humanity struggles to adapt and thrive in this harsh yet innovative environment.

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