angles appearance background beams below beneath bridge concrete deck light lower lower-deck perspectives piers pillars reflections secure solid steel strength strong structure structures surface surfaced surfaces texture textured textures thick under undercover water confined display displayed engines equipment heavy heavy-duty historical history locomotives machinery machines mobility power powerful rails railway railway-yard restoration restoration-yard restored steam-engines steam-locomotives steam-trains trains transportation abstract architectural architecture basic brick brick-wall bricks color colored colors colour coloured colours exterior external rough smooth standard uneven variation varied various wall wallpaper