Ключевые слова: abstract, architecture, background, building, buildings, bunker, cement, circular, city, coal mine, construction, design, empty, entrance, facility, floor, grunge, helical, helix, historic, industrial, industry, infrastructure, installation, level, levels, light, lot, mining, modern, outdoors, perspective, place, production, production line, railing, ramp, round, rust, steampunk, steel, streetlife, structure, tower, transport, urban, urbania, view, white,