Benfield also adds an 11th city to the list.
"I would be remiss if I didn't add that we all probably have a candidate or three to add to that list. That's part of the fun of lists like this. Me, I'm adding Geneva (photo above), which has all the key ingredients that Frommer's picks have, plus one that most don't: an amazingly walkable scale, because of its somewhat smaller size. On a clear day you can see Mont Blanc, too, and every day you can see Lake Geneva while you walk. Not too shabby."