Personal life and scientific trajectory of Vanni Blengino (1935-2009) have always travelled on a double track: Italy and Piedmont, where he came from, and America, or rather Argentina, a country that contributed so much to his development as Spanish-American literature's scholar, a discipline that he has been teaching for almost forty years at Roman Universities (first La Sapienza, then Roma Tre). In his works, supported with recurring journeys in Argentina, Blengino has never left out his main intellectual concern: the study of the relationship between Italy (Europe) and America (Argentina) for the construction of an identity crossing two worlds, whose symbol is the migrant figure. This essay investigates Blengino's critical contribution to identity topic through the analysis of his main research fields: the frontier, the Argentinian imaginary on immigration, and the travels of Europeans and Spanish-American intellectuals from one to the other continent.