This German city is one of the most stylish in the country as well as having some of the most stylish shops. A walk along the Königsallee proves that. Düsseldorf also has a vibrant arts scene dating back to the 17th century. The city also holds the Quadriennale art festival. And we visit the "Theke" or "longest bar" in the world which is a nickname for downtown which boasts more than 250 bars.