The svelte Danube Island stretches some 21.5km from opposite Klosterneuburg in the north to the Nationalpark Donau-Auen in the south and splits the Danube in two, creating a separate arm known as the Neue Donau (New Danube). Created in 1970, it is Vienna’s aquatic playground, with sections of beach (don’t expect much sand) for swimming, boating and a little waterskiing.

The tips of the island are designated FKK (Freikörperkultur; free body culture) zones reserved for nudist bathers, who also enjoy dining, drinking, walking, biking and inline skating au naturel – it’s quite a sight. Concrete paths run the entire length of the island, and there are bicycle and inline-skate rental stores. Restaurants and snack bars are dotted along the paths, but the highest concentration of bars – collectively known as Sunken City and Copa Cagrana – is near Reichsbrücke and the U1 Donauinsel stop. In late June the island hosts the Donauinselfest.