Ключевые слова: architecture, barge, boat, bridge, building, buildings, business, cargo, cathedral, city, cityscape, construction, dome, downtown, europe, finance, financial district, frankfurt, germany, hesse, landmark, landscape, large, main, main river, office building, outdoor, panorama, river, ship, sightseeing, sky, skyline, skyscraper, stream, streamboat, summer, tourism, tower, traffic, transport, transportation, travel, traveling, urban, vessel, water, waterfront, wave,