While there's no door immediately visible, as he moves to the strange, glowing cave wall at the back of the room, he finds that his hand passes through it, harmlessly... and that there's a door on the opposite side.<br/><br/>This metal room is brightly lit by glowing panels in the ceiling above. To the left and right, complex machines consisting of spiral tubes and nozzles twitch and hum. A DC 8 Perception check reveals a strong scent of ozone in the room... lightning has passed through it, recently, and regularly.