Ключевые слова: above, architecture, background, blue, bridge, bright, building, city, construction, corridor, crossing, design, elevated, empty, fence, floor, footbridge, geometric, glass, inside, interior, iron, ladder, light, metal, modern, outdoor, overground, overhead, overpass, passage, pedestrian, perspective, protection, range, roof, safety, security, stair, staircase, stairs, stairway, stairwell, steel, street, structure, tunnel, upstairs, urban,