In the northern part of the small lakes at the beginning of the Upper Havel waterway is Neustrelitz. This former residence of the Dukes of Mecklenburg-Strelitz, has an impressive baroque square and interesting streets. With its cultural offerings (State Theatre of Mecklenburg, Kachelofenfabrik, Slavic Village) and good shopping, a visit is worthwhile. A walk through the castle garden with its large lawn and orangery is not to be missed.
Between Neustrelitz and Furstenberg is beautiful countryside along the Upper Havel. The banks are natural and are largely untouched. Look out for kingfishers and if you are very lucky you may see osprey. There are many tranquil bays. Der Wasserwanderrastplatz in Wesenberg offers a beautiful anchorage.
Furstenberg offers a wide variety of things to do. There are many restaurants and in the old town you can admire the historic fishermen's houses. A visit to the Ravensbrück memorial provides insights into the recent history of the place.
In Himmelpfortgrund, stop and visit the old city and the Christmas post office. After this you are now entering one of the most beautiful sections as the Upper Havel gently winds between Himmelpfortgrund and the castle walls. It is a unique place for nature. At the start of this waterway is Schorfheide, which is an unspoilt area of marsh. In this area even cranes and gray geese breed. Even if you have no plans to go towards Berlin it is worth making this detour to experience the route.
Another worthwhile detour is to Templin. The old town has well preserved medieval city walls and a modern natural thermal spa will make a memorable day ashore. The historic drawbridge and lock are a couple of sights best seen from the boat.