a curving flight concrete spiral staircase at blavatnik building of tate modern switch house extension

light abstract angular structure architectural architecture interior area art background beautiful blavatnik building composition concrete contemporary curve curved stair decor decorating decoration decorative design elements detail distinctive dynamic europe european famous glass inside landmark lattice brickwork pattern perspective picturesque ramps sightseeing simple spiral staircase stairway steps stretches switch house extension tate modern texture textured tourist attraction travel destination view wallpaper curving flight london nov 2023 extension main perforated space text selective focus