Claim: Delta del Paraná is the 320 kilometres (200 mi),14,000 square kilometres (5,400 sq mi) delta of the Paraná River in Argentina.
Evidence: 320 kilometres (200 mi) 14,000 square kilometres (5,400 sq mi) The Paraná Delta (Spanish: Delta del Paraná) is the delta of the Paraná River in Argentina and it consists of several islands known as the Islas del Paraná. 
It covers about 14,000 square kilometres (5,400 sq mi) 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. The total length of the delta is about 320 kilometres (200 mi), and its width varies between 18 and 60 kilometres (11 and 37 mi). During the part of its course downstream from the city of Diamante, Entre Ríos, it splits into several arms and it forms the Paraná Delta.