Entering it, the loud whirring is abated somewhat, and the air stills now that it isn't being stirred about by the huge cogs of the machines. This hallway starts very large, a full story in height, you'd estimate, and gently narrows down to a point about five hundred feet in the distance, though that might be a trick of the light.

This would seem to have been an unfinished access tunnel, from the electric lights giving off their orange glow and an eerie luminescence that the walls themselves emanate. The floor is dirt and the path narrows with the shaft itself.