Dahlia guides them out of the room, under the arch, down the rough stairs, to the large cavern with scaffolding on one side. She make her away along it until she reaches the place they first arrived at this side of the cavern and then cuts across the cavern to the far side, where there should be a very long set of stairs taking them back up to the tunnel. The plan, after that, is to take the tunnel back up to the entrance, near the lynx, and get out of here.