Our highlights of this route:
After visiting the palaces in Potsdam you can boat the Havel to Spandau. Thereby, you will pass the Olympia Stadium Berlin. Staying on the Havel and its streams you can discover the National Park Uckermärkische Seen. Furthermore, by following this route you can explore the Müritz as well as the Plauer See.
Next to the many wonderful cities located at the water you will come by the Havelberg and end up on the Havel again.
You can follow it up to Brandenburg and have a look at a lot of different cities and places.