I was in Berlin and fancied a bit of a walk so I did this. Friedrichstrasse to Alt-Tegel is an easy journey by U-Bahn up the U6 line. Alt-Tegel is also the name of a street which I followed east past coffee shops and restaurants and then the pretty Village Church to reach the lakeshore and the Greenwich Promenade where a dislocated red British phone box and letter box are set up to make the visitor feel like he really is in Greenwich. Walking north along the shore a bit one comes to a bridge and, keeping on the same way, Gabrielenstrasse. Here too I kept straight on but got a bit confused over the way I would recommend instead turning right briefly at Gabrielenstrasse to pick up the path that follows the shoreline more closely. Then you will find you way easily, as I did more hesitantly, to the Waldhütte restaurant..
A road goes off to the right from here. And a very short way down it a track goes off to the right marked with a sign saying “Landschaftsschutzgebiet” with a picture of an owl. This is the way. It leads through the woods, passing what a sign proclaims to be the highest tree in Berlin. A bit before that some more signs tell the visitor about the extreme storm that hit hereabouts in 10th July 2002. Eventually the path emerges on the Havel See. If in doubt there are signs saying ‘Wanderweg 7’ stuck on trees here and there. On reaching the Havel See finding the way gets very easy indeed. Turn left and follow the path along the shore all the way back to the Waldhütte. At one point a little after the headland the path was closed but a quite detour – left up Scharfenbergerstrasse then right down Tegelorter Ufer brought me back onto it. At the very end the path by-passes a little peninsula with some expensive looking real estate on it