Ключевые слова: allegheny, america, american, andy, architecture, area, artist, blue, bridge, bridges, building, buildings, business, center, city, cityscape, district, downtown, engineering, historic, industrial, infrastructure, land, landmark, landscape, metropolis, monongahela, outdoors, pa, pedestrian, pennsylvania, pittsburg, pittsburgh, population, river, roadways, scenic, shoreline, skyline, skyscrapers, suspension, town, transportation, travel, urban, usa, warhol, water, waterfront, yellow,