Public domain photos

The image shows a group of people wearing helmets walking through a tunnel at night, illuminated by lights and surrounded by walls on either side. In the center of the tunnel is a large propeller, and the floor is visible at the bottom.

The image shows a group of people wearing helmets walking through a tunnel at night, illuminated by lights and surrounded by walls on either side. In the center of the tunnel is a large propeller, and the floor is visible at the bottom.Open in library