Stock photography, photos: Stockholm subway Stock photos of Center of operations for the Stockholm, Sweden under-ground Green Line.Photo: Rolf Adlercreutz Photograph: © Rolf Adlercreutz Click for a larger image and more information Keywords associated with this stock photo: Connex, view, railway, underground, subway, Stockholm, Sweden, Europe, European union, EU, travel, commute, center, control, train, computor, board, run, traffic