Ключевые слова: architecture, austria, background, bavaria, bavarian, blue, boat tours, building, cathedral, church, city, cityscape, czech republic, danube, danube river, dome, europe, german, germany, ilz, inn, landmark, landscape, nature, panorama, passau, sightseeing, sky, skyline, stephansdom, tourism, tourismus, town, travel, upper, upper austria natur, vacation, view,