As a football fan, the mentioning of Argentina produces an instinctual reaction of one name to come to mind - Messi. The Greatest of All Time represents something of a religious figure for fans of the beautiful game, and subsequently a pilgrimage to his home-city of Rosario was an essential on my Argentinean itinerary. In addition to Messi, Rosario also boasts the title of the birthplace of the hipster's favourite revolutionist Che Guevara - that makes up quite the fantasy tea party if you ask me. To top it all off, Rosario is known as the most dangerous city in Argentina, rife with the trafficking of both narcotics and human beings...
If that doesn't scream tourism honeypot I don't know what does.