Ключевые слова: against the sun, architectural, architecture, building, business, circle, circular, city, concept, curves, design, glass, glass staircase, glass stairs, going down stairs, going up stairs, high tech, hitech, indoor, indoors, interior, landmark, light, looking up, modern, no face, people, people silhouette, perspective, silhouette, sky, spiral, staircase, stairs, stairway, step, structure, technology, transparent, urban, view,