spalling concrete, extreme example

abstract aged aggregate architecture back background blank broken building calcium carbonate cement chalk city color colorful colors concrete crack cracked cracks damaged dark deco detail details deteriorate deteriorating dingy dirty discolor discoloration drain draining driveway escape escaping exterior flake flaked flaking grade graphic grunge grungy leech leeching lime old outdoor outside peel pit pitting retro rough rustic side sidewalk split stain stained stark step steps streak streaked streaking street structure style surface texture textured urban vintage worn