The embankment walls of the Danube Canal form a single, giant canvas. Graffiti artists are allowed to spray their artworks there as they choose and perfectly legally, too. There is much worth looking at amongst it all.
Address: Donaukanal, district 1, Vienna
Public Transport: Underground: U1, U4 (Schwedenplatz); Tram: 1, 2 (Schwedenplatz)