they were manned, guarded — you definitelyjust could not get off. athena kerins leads tours for a group called berlin underworld, which explores the tunnels and passageways underneath the city. so alexanderplatz would have been a ghost station, pretty eerie. what would that have been like? so, for the west berliners coming through, it would have been dark, a little bit eerie, withjust the glowing emergency exit signs, maybe a bit of light creeping in from the tunnel itself. for the east berliners, it would have been completely different, because they weren't allowed to know about this at all. if they knew that it was coming through here, they might be tempted to get into the train station or the tunnels and use them to escape. but even before those 28 years of division, the tunnels down here harboured secrets. athena's taken me to one of the world war ii bomb shelters built into the u—bahn network.