Behind the Clark Kent exterior lurks a super-memorable luxury hotel. Art`Otel shows that a fine hotel can have conservative good taste without sacrificing style and personality. Everything from the artwork decorating the rooms and halls to the design of the carpets and chinaware was the brainchild of one man, American artist Donald Sultan. Choose between rooms in the new wing, with views of the Danube or Castle Hill, or the gorgeous 18th century Baroque buildings.