Ключевые слова: background, city, cityscape, covered, day, daytime, diagonal, downtown, dutch, empty, environmental, europe, european, grass, green, holland, line, nature, netherlands, outdoor, outdoors, park, public, public transport, rail, railroad, railway, rotterdam, steel, street, sustainable, town, tracks, traffic, train, tram, tram tracks, tramway, transport, transportation, travel, trees, urban,