aluminium architecture block blue building city diamonds England english futuristic Gherkin glass gray Great Britain grey iconic landmark London metal modern offices power reflections silver skyscraper tower triangles windows angles appearance background brick bricks brickwork build building-blocks colors colours cracks firm loose perspectives rough selected selection singles solid strength surface surfaces texture textures variations variety walls beams Canary Wharf curved DLR Docklands Light Railway elements girders lattice railway roof station tower block transparent urban crowns factory flats hill horizon houses housing line loading loading ramp nature panorama park parking parking place parks residence residential residential area sky tree trees truck view warsaw blocks bridge buildings cathedral church cityscape landmarks river shard St Paul's thames track train transport water 3D abstract box concept construction cubes decoration design digital fill flowers geometric graphic illustration original pattern pile pink rise scrapbooking shadows square stack steps structure symbol technology tumbling unique white brown iron walkie-talkie