abstract ba1969 beads gravel paper rock rocks stone stones texture future path pathway perspective slab step stepping background brick brickwork building decorative desktop grey house pattern slate stone wall structure structures textures tile wall wallpaper construction Nyberg pavement paving pile sloop steep abstract background black brick stone bricks brown city decay grunge grungy red tiles urban urban decay walls warm architectural architecture bedrock colors colours formation heritage historic Historic site kiln kilns landscape light lime-kilns park patched patchwork repairs rock-work rubble ruins shadows stairs steps stone-steps stone-wall stone-work sunlight surfaced surfaces surfacing textured trees variations varied vegetation decoration gable