A pub crawl around the brewpubs in Colgne or Dusseldorf is an event in itself. If you want to know what Kölsch is really like, you have to go to Cologne and Drink in Früh, Päffgen and Malzmühle. Same in Dusseldorf, with the Alts in Uerige, Shuchmacher, Schlüssel and Füchschen.