Stock shots of Rosario in Argentina The city of Rosario in Argentina is the largest city in the province of Sante Fe and the country’s biggest exporter of soy and its sub products: about 80% of Argentina's soy production leaves Rosario on container ships on the Parana river. The city is also Ernesto "Che" Guevara's birthplace: the Marxist revolutionary was born there in 1928. Stockshots.