Lying on the Parana River, Rosario is a city that seems permanently in the throes of strutting, sunning and smooching.

Sultry and sophisticated, at first glance, Rosario seems like an unlikely hometown for South America's favourite socialist. But sure enough, Che Guevara popped out of the ornate white house (now an insurance business) on the corner of Entre Rios and Urquiza streets.