Ключевые слова: america, arch, architecture, autumn, beautiful, bridge, cathedral, city, column, construction, downtown, engineering, gothic, grass, green, historic, infrastructure, john, landmark, landscape, metropolitan, nature, northwest, old, oregon, outdoor, overpass, pacific, park, pillar, portland, river, scenic, sky, st, structure, tourism, tower, traffic, transportation, travel, tree, urban, usa, view, water, willamette,