The French National Railway Company (SNCF) launched a new, interactive campaign to remind people just how close Europe really is to Paris. In conjunction with TBWA\Paris, the doors, positioned around Paris, live-chat with strategically placed cameras in different cities – in Barcelona there awaits a dance troupe, while in Milan a mime interacts with viewers on the other side of the door. It’s a cool application of out of home advertising, and is yet another example of how innovative, interactive advertising can still break boundaries.