Originally Posted by chtiet
...Cologne does have the cathedral, so that alone would determine it for me (if you've never been)...Cologne was completely destroyed in WWII...
The cathedral is nice, and there is a lot of lore on how it survived the bombing. Kinda like St. Paul's in London. Dusseldorf has a nice cathedral also, but it is not as magnificent. Nevertheless, I would still choose Dusseldorf, overall I just prefer the ambience there.
M8