Ключевые слова: allegheny, america, american, architecture, beautiful, bridge, building, business, city, cityscape, district, downtown, famous, financial, historic, infrastructure, landmark, landscape, modern, monongahela, office, ohio, pa, panorama, pennsylvania, pittsburgh, rivet, road, scene, scenic, sky, skyline, skyscrapers, states, steel, street, structure, suspension, tourism, transportation, travel, truss, united, urban, us, usa, view, water, waterfront, yellow,