We have allocated three nights to stay in either Cologne or Düsseldorf in early May. The plan is to spend one day touring each city and then rent a car for one day and drive to Burg Eltz and time permitting, stop in Bonn. We're avid travelers in our early 40s and enjoy art, history and good food and drink. Neither of us has been to this area before.
So, what say you - do we base ourselves in Cologne or Düsseldorf?