Ключевые слова: abstract, airport, architecture, background, black, blue, building, business, center, city, closeup, design, device, down, elevator, empty, entrance, equipment, escalator, indoors, inside, interior, light, mall, metal, metallic, metro, modern, motion, nobody, office, people, shopping, stair, staircase, stairway, station, steel, step, subway, support, technology, transport, transportation, travel, underground, up, urban, view, white,