Ключевые слова: abandoned, aged, ancient, architecture, bethlehem, brick, building, business, chemical, chimney, city, construction, dark, dirty, empty, energy, exterior, facade, factory, fuel, grunge, industrial, industry, low, manufacturing, metal, mill, obsolete, old, pennsylvania, plant, pollution, power, recession, red, river, rusty, sky, station, steel, structure, tower, urban, vintage, wall, warehouse, water, weathered, work,