This is so hard there are too many. For my 60th, a couple of years ago we visited Argentina, I just loved Buenos Aires exceeded expectations. I also feel very lucky to have visited America quite a few times, really liked Charleston and Savannah more than the larger more obvious cities, although I remember being knocked out by New York first time I went there but less so the second time, really liked Los Angeles, inspite of everyone telling us to give it a miss. Boston didn't live up to expectations for me. The Latin side of me has drawn me to Italy many times over the years, rather than colder northern Europe. Italy for me has always been the most beautiful, albeit chaotic of European countries, amazing cities too hard to select one, I have been lucky enough to holiday in Rome, Florence, Genoa, Sienna, Padua, Verona and Venice, failing to appreciate the latter at 21, fell in love with it a couple of years ago, I guess it's a grown up place. I never fell in love with Paris I prefer some of the smaller regional cities of France such as Lyon, Bordeaux, Blois, Nice, Rouen. Haven't been to Melbourne or Sydney but liked Perth along with Vancouver Canada, New world cities have a different sort of excitement to those with centuries of history. I haven't done Scandi or German cities but hope to rectify that. Visited Dublin two years running in December I love it there particularly in the Christmas run up. Finally, can't fail to mention London on my door step, for all it's dowsides, I think it's a wonderful world class city.