We were pleseantly surprised, even in December, by the amout of parks and open spaces around the centre od Duddeldorf. The Hofgarten is obviously a fine park and is tended to by workers with a sense of civic pride.
The lake is nice to walk by, although I was disappointed that by Camera battery was down and I failed to get a picture of the warning sign of a up-side-down duck in water with a red cross through him (so what's that all about then ?).
Dussuldorf also has a number of other 'greened' areas such as the Canal on the 'Ko' and the area by the Rhein.