Ключевые слова: architecture, blue, building, business, center, closeup, commerce, commercial, construction, corridor, day, downward, elevator, empty, escalator, footstep, free, glass, hall, hallway, indoor, inside, interior, light, lines, mall, metal, modern, nobody, office, perspective, public, rails, raise, staircase, stairs, stairway, steel, subway, supermarket, tint, tone, transportation, up, upward, urban, walk, walkway, way, wide,