abandoned building abandoned factory boiler disused factory empty factory industrial industrial decay old boiler old factory old industrial urban decay Alley factory industrial works old factor old works windows works building construction crane elevator engineering equipment industry iron machine machinery metal old steel structure technology elements large pile piled pipe pipelines pipes rust rusty background textures arched brick decay destroyed famous high historic production red renovation retro sky traditional wall erode erosion gouge grunge oxidation oxide paint scratch speckle speckled surface texture wear worn brown cold communication dark grungy rope ropes tow towing winding winter wire wired