interior of a road tunnel, likely an underpass, in Sofia, Bulgaria

interior of a road tunnel, likely an underpass, in Sofia, Bulgaria. The tunnel walls are dark, possibly concrete or stone, with a series of evenly spaced lights mounted on the left wall. The right side of the tunnel includes a pedestrian walkway or access area, separated from the road with a metal railing. There's a parallel structure with illuminated openings, possibly windows or vents, above the walkway, suggesting another level or adjacent structure. The scene is predominantly lit by the tunnel lighting, and the image is taken from a low angle looking into the tunnel. The image provides no evidence of people or specific actions.