The Parnaíba River is a significant waterway in northeastern Brazil, flowing through the states of Piauí and Maranhão. It originates in the Serra das Confusões mountain range and travels approximately 1,100 kilometers before emptying into the Atlantic Ocean. The river is known for its diverse ecosystems and plays a crucial role in the local economy, supporting agriculture and fishing. The river also forms part of the Parnaíba Delta, one of the largest river deltas in the Americas. This delta is home to various wildlife species and is a popular destination for ecotourism. The Parnaíba River is vital for transportation and irrigation in the region.