Gualeguaychu Carnival (Carnaval de Gualeguaychú)

In Argentina, the most famous carnival celebrations are held in the Argentine Mesopotamia and the North-West. Gualeguaychú in the east of Entre Ríos province is the most important carnival city and has one of the largest parades, with a similar afro-American musical background to Brazilian or Uruguayan Carnival. Corrientes is another city with a lively carnival tradition (and is also the "National Capital of Carnival") which involves the chamamé music, a kind of polka, and large parades at the Carnival weekends. In the North-West, Carnival is influenced by indigenous traditions, above all in the valley towns of Humahuaca and Tilcara. In all major cities and many towns throughout the country, Carnival is also celebrated, but less famous than in the above mentioned places.

source: wikipedia