Ключевые слова: abstract, architecture, background, building, buildings, bunker, cellar, cement, city, concrete, construction, corridor, darkness, design, door, empty, entrance, facility, floor, footpath, grunge, hallway, helical, helix, historic, indoors, industrial, industry, infrastructure, level, levels, light, modern, old, passage, perspective, place, production, railing, road, round, steampunk, streetlife, structure, traffic, underground, urban, urbania, view, white,