World Cities???
Athens - Just got back from there, but wow!
Munich/Nuernberg/Regensburg - I live an hour from all three of these, and they are awesome places to visit. (As an aside, any CFer who can make it to one of these places when I'm not in a training cycle can have a free tour and the first beer on me!)
Savannah, Georgia - Just love this town/area.
Kiev, Ukraine - Used to be home of the world's strongest beer (Imperial Ale - 18.5% alcohol, and I once drank 1.5 liters of it at lunch on a dare....

) I also convinced the woman I loved more than life that she should feel the same about me, here.