The image shows a tunnel with a metal railing on both sides. The tunnel appears to be part of a transportation system, possibly a subway or train line. The railings are made of metal and are painted in a dark color, likely black or dark gray. The tunnel is long and runs horizontally across the image, with the left side being slightly longer than the right side. The background is not clearly visible due to the focus on the tunnel itself. There are no visible people or other objects in the image.