The airport in Cologne is ranked #4 according to the amount of air traffic it receives, and has earned a reputation for handling these crowds efficiently. In recent years, Cologne has focused on not only handling inter-European traffic, but from further destinations as well. While it has been designed to be efficient for transportation, I’m not a fan of the train station in Cologne (and its unhelpful staff.) The city of Cologne is beautiful and worth visiting for more than just the Cathedral, just try and avoid the train station if possible.