backdrop background grunge grungy hue hues rust rustic rusty series shade shades texture tone tones variation variations elements industrial industry iron large metal old pile piled pipe pipelines pipes steel textures abstract green metals oxide rusted rusting structure wheathered bark card design floral flower flowers nature plant rock stone Tinneketin blue chain chains child children chute ladder park pla red steps swing swings yellow decay decay.background.iron drip dripping free image painted peel peeled photo scratched stock external fire escape gray grey hand rails outside stairs strong sturdy weathered gear gears numbers oxidation railroad rusting.rusted surface train trains wheel wheels brown country line path rail rail-way railway rural track tree