The grin Steve gave Bruce then could only be described as boyish, and he moved back in to peek inside the tunnel. "Okay, let me see..." After a quick estimation, he moved down the wall and pried open another panel, and then one behind it - and only then found the bend in the tunnel.

"There's a crossroads up there," he told Bruce, moving back for him to have a look for himself. "And I think tunnels up and down." There was probably a maze of these tunnels inside the station.