abstract background brick building city color decay pattern red stone strong texture tile urban wall gravel limestone path pebble pebbles river rock rocks sandstone shingle shore stones black details dots grunge grungy number orange three cliff coloured colours detail erosion minerals nature patterns surface wallpaper coast contorted contours cyprus eroded mediterranean mudstone natural shapes construction cube cubes granite gray grey paving pavingstone pavingstones street beach coastline sand soak sundrocks water wet