Ключевые слова: aerial, america, american, architecture, bridge, building, buildings, city, cityscape, contemporary, district, downtown, duquesne, exterior, financial district, funicular, incline, inclined, landmark, modern, monongahela, north america, office, office buildings, pa, pennsylvania, pittsburgh, railroad, river, sightseeing, skyline, skyscraper, skyscrapers, sunset, tourism, travel, united states, us, usa, view,