Can somebody recommend some viewpoints in Lucerne where I can take pictures back over the City. Should I just head for the wall and the towers and see what I like?
The towers would also be my first try. You get a nice view of the city from Mt. Rigi, but it's at a distance.
The walls don't actually give much of a view.
Anywhere on the lakeside or riverside, or from a lake boat.
Or, go up one of the local mountains, Pilatus or Rigi. This is the view from Pilatus: http://pilatus.webtuning-cdn.ch/webautor-data/2/Panorama-Pilatus-1.jpg