Danube-Auen National Park on both land and water, and other invertebrates, the total number of species in Donau-Auen National Park is estimated to be at least 5,000. Danube-Auen National Park Donau-Auen National Park () covers 93 square kilometres in Vienna and Lower Austria and is one of the largest remaining floodplains of the Danube in Middle Europe. The German word Aue (variant Au) means "river island, wetland, floodplain, riparian woodland", i.e. a cultivated landscape in a riparian zone. The words Aue and Au occur in a large number of German place names—including Donau, the German word for the Danube River—and refer to forests,
Waves of the Danube of his wedding with Tatiana, in Lazarevo. Waves of the Danube "Waves of the Danube" (; ; ; ; ) is a waltz composed by Ion Ivanovici in 1880, and is one of the most famous Romanian tunes in the world. The song has many variations throughout the piece, reminiscent of the music of Johann Strauss. Through the Viennese style variations, there is still a distinct Slavic style. In the United States, it is frequently referred to as "The Anniversary Song", a title given by Al Jolson when he and Saul Chaplin released an adaptation of the song in 1946.