Ключевые слова: architecture, austria, autumn, background, beach, beautiful, bridge, city, cityscape, clouds, damn, danube, dusk, ecology, ecosystem, environment, environmentalism, europe, fog, harbor, horizon, horizontal, jetty, landmark, landscape, monochrome, nature, outdoor, rail, reflection, river, scenery, sky, skyline, sunset, tourism, transportation, travel, view, water, weather, winter,