The Lençóis Maranhenses in the Maranhão state of Brazil is the home to Lençóis Maranhenses National Park. The park area is a low and flat plain and usually becomes flooded during the rainy season. It is often overlaid by large sand dunes and covers an area of more than 1000 square kilometers.
The area experiences abundant rainfall and has no such vegetation. The Lençóis Maranhenses National Park was established in the year 1981 on the banks of the river Preguiças. The park is a protected and quite extensive area very vehicles are permitted to enter the park area. The common sights of large, sweeping dunes are noticed and give the Lençóis Maranhenses a look of an archetypal desert.
It is situated outside the Amazon basin and get abundant of rainfall during the rainy season which cause weird phenomenon. The site of fresh water getting collected between near the valleys located between the sand dunes are often marked by blue and green lagoons all around the deserted land. They boom to their fullest in the months of July to September during the rainy months of the year. A large variety of fishes are noticed in the lagoons whose eggs are thought to be carried to this place from the sea by birds during the rainy months that disappear completely during the dry season.
The national park was established with an intention of protecting the ecology of the area. The people who reside in the park area are usually fishermen who come here during the rainy months to catch fishes but leaves in the dry season to neighboring lands for farming.