The Paraná Delta is the delta of the Paraná River in Argentina and it consists of several islands known as the Islas del Paraná. The Paraná flows north–south and becomes an alluvial basin between the Argentine provinces of Entre Ríos, Santa Fe and Buenos Aires then emptying into the Río de la Plata. It covers about 14,000 square kilometres and starts to form between the cities of Santa Fe and Rosario, where the river splits into several arms, creating a network of islands and wetlands.