It’s nicknamed the Eternal City for a reason. In Rome, you can drink from a street fountain fed by an ancient aqueduct. Or see the same profile on a statue in the Capitoline Museum and the guy making your cappuccino. (Which, of course, you know never to order after 11 am.) Rome is also a city of contrasts—what other place on earth could be home to both the Vatican and La Dolce Vita?
Buenos Aires, Argentina "Paris of South America." As anyone who's been there will tell you, this city has a spirit all its own. Spend a day visiting the city's many fine museums and the amazing Recoleta cemetery, then hit the modern Puerto Madero neighborhood at night to take your pick of the city's coolest restaurants and clubs.