In 2016 I've visited the Photokina tradefair in Cologne. The biggest fair for imaging and photography. Sadly we'd only one day in cologne and had to leave in the evening to head back to Stuttgart. There was still a bit of time left until we had to catch the train, so we decided to walk from the fair to the mainstation instead of taking the metro. Probably the best decision of the day since the walk back to the station had millions of opportunities to waiting for us.