/Gabriel Elizondo/Al Jazeera
Huts off in the distance where people used to live are seen in Lencois Maranhenses National Park, which is nearly 300 square kilometres.
/Gabriel Elizondo/Al Jazeera
A home that was abandoned after being covered by the sand dunes.
/Gabriel Elizondo/Al Jazeera
A solar panel on the roof of the house of the Santos family is their only source of electricity.
/Gabriel Elizondo/Al Jazeera
Fishing here is done in a traditional manner by dragging nets through the river by hand.
/Gabriel Elizondo/Al Jazeera
At night, the home of Cleidy and Claudio Santos has electricity from one solar panel.
/Gabriel Elizondo/Al Jazeera
The Santos family going to fish in the afternoon.
/Gabriel Elizondo/Al Jazeera
Fishing nets hang from a hut, an indication of how important fishing is for the people who live here.
/Gabriel Elizondo/Al Jazeera
Here the sand dunes push right up to the water, and families pull nets to fish.
/Gabriel Elizondo/Al Jazeera
Maria Julia Martins, left, and Antonio Martin Vieira, at rear, say they live on the sane dunes and fish because they can't afford to live in a city.
/Gabriel Elizondo/Al Jazeera
At night, when it cool, animals like frogs come out on the dunes.
/Gabriel Elizondo/Al Jazeera
Marinalda Pereira, in purple top, says the lack of rain this season has dried up lagoons where they used to fish.
/Gabriel Elizondo/Al Jazeera
Many of the community elders also go fish each day with their kids.
/Gabriel Elizondo/Al Jazeera
Families that live on the dunes raise animals to eat.
/Gabriel Elizondo/Al Jazeera
Most of the people have horses, which they use as a means of transportation.
/Gabriel Elizondo/Al Jazeera
The residents of the sand dunes are resilient people who have survived tough conditions.