It flows from its origin on the Parnaiba River southwest of the city of Parnaíba to the mouth on the Atlantic Ocean near the city of Luís Correia.
Portinho Lagoon is one of the most beautiful landscapes of Piauí and the advantage that the blue waters can turn green depending on the light of the sun, the dunes, surrounding a whiff of fresh water, ideal for practicing water sports on banana boat, jet skiing and windsurfing
The airport is located on a privileged area with great touristic potential, near the municipalities of Camocim e Jericoacoara, in Ceará, the delta of river Parnaíba, in Piauí, and Lençóis Maranhenses National Park in Maranhão.
Caenotropus is a genus of chilodontid headstanders from South America, found in the Orinoco, Parnaíba, and Amazon Basins, as well as various rivers in the Guianas.
The Parnaíba River rises in the Chapada das Mangabeiras range, and flows northeastward for 1,056 miles (1,700 kilometers) to empty into the Atlantic Ocean, being the longest river entirely located within Brazil's Northeast Region.