Ключевые слова: activity, attraction, austria, blue, cellular, communication, connection, construction, danube, danube city, danube park, danube tower, destination, domestic, engineering, europe, famous, green, high, hotspot, important, interest, journey, large, local, lookout tower, metal, national, network, park, place, point, radar, sightseeing, signal, sky, steel, tall, technology, television, top, tourist, tower, travel, typical, vacation, vegetation, vienna,