The underground city in *"Tunnels"* is a stunning, surreal blend of ancient and modern elements, hidden deep within the sewer system. **Architecture:** The city features towering structures that combine ancient, gothic- like stone buildings with crumbling modern skyscrapers. Some of the buildings are adorned with intricate carvings and arches, reminiscent of old cathedrals, while others have rusted metal frameworks and shattered glass windows, giving them a dystopian feel. The mix of old and new creates an eerie, otherworldly atmosphere. **Lighting:** The city is dimly lit by a combination of flickering, old- fashioned street lamps and strange, bioluminescent plants that grow along the walls and buildings. These plants emit a soft, greenish glow, casting eerie shadows and providing just enough light to navigate the winding streets. **Streets and Pathways:** The streets are narrow, winding pathways, some paved with cobblestones and others with cracked concrete. Small bridges and walkways connect different levels of the city, with some leading to hidden courtyards and others disappearing into the darkness. **Atmosphere:** The air is thick with humidity, and the sound of dripping water echoes throughout the city. There’s a sense of abandonment and decay, but also a feeling that the city is still alive, with hints of movement and distant, shadowy figures that suggest it is inhabited by unknown beings. This underground city is a mysterious, forgotten world, where history and the remnants of civilization intertwine in a haunting, atmospheric setting