The image displays an upward-looking view of a dark grey metal spiral staircase within the interior of a tall, cylindrical structure

The image displays an upward-looking view of a dark grey metal spiral staircase within the interior of a tall, cylindrical structure. The staircase features riveted construction on its treads and support beams, with a continuous handrail following the helix. An industrial-style light fixture, encased in a protective wire cage with a fluted glass cover, is attached to a vertical support beam adjacent to the staircase via a conduit system. The surrounding walls are composed of light-colored, rough-hewn stone or concrete, exhibiting an uneven, textured surface. Towards the top of the image, wooden ceiling beams are visible. Natural light illuminates the space from above and through a rectangular window opening partially visible on the right side. No individuals or active subjects are present. This scene depicts the internal structure of the Shabla Lighthouse, located in Shabla, Bulgaria.