Ключевые слова: architecture, beauty, bridge, buildings, calm, city, cityscape, clouds, colorful, dusk, evening, horizon, landscape, light, lights, nature, nightfall, outdoor, panorama, pittsburgh, reflection, reflections, river, scenic, silhouette, sky, skyline, summer, sunset, tourism, tranquility, transportation, travel, urban, usa, vibrant, view, water, waterfront,