You can take a tour all around the harbours of Cologne with the excursion steamers from Kölntourist. With that tour Tiger comes to places he has never been to, even though they are in the middle of his hometown.
On board the ships there is a very friednly service wich will supply you with small refreshments, and there are explanations of everything you can see on port and starboard.
A great experience that lasts for over three hours and is a lot of fun. Aye!
You can find the full report on my big harbor tour here: