Ключевые слова: abstract, angle, architectural, architecture, attraction, blue, building, circle, circular, city, construction, curled, curve, design, down, downward, entrance, exit, helical, helix, illusion, indoor, inside, interior, light, look, marble, nobody, pattern, railing, rotate, round, screw, spin, spiral, stair, staircase, stairway, stairwell, steel, step, top, tower, tunnel, vertigo, view, walkway,