smokestacks, tubes, and pipes with heavy rust patina, catwalks

abandoned architecture aspect bethlehem blast brown building catwalk catwalks chimney column corroded decaying derelict exterior factory flaking furnace heavy industrial industry ladder manufacturing metal mill nobody old outdoors outside paint patina pattern peeling pennsylvania people pipe pipes red rivet rust rusty smokestack smokestacks stacks stained stairs steel texture tube tubes urban vent vertical vintage walkway