Lençóis Maranhenses National Park, Brazil

Lençóis Maranhenses National Park, Brazil

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Lençóis Maranhenses National Park (Parque Nacional dos Lençóis Maranhenses[a]) is a national park in Maranhão state in northeastern Brazil, just east of the Baía de São José. Protected on June 2, 1981, the 155,000 ha (380,000-acre) park includes 70 km (43 mi) of coastline, and an interior composed of rolling sand dunes. During the rainy season, the valleys among the dunes fill with freshwater lagoons, prevented from draining by the impermeable rock beneath. The park is home to a range of species, including four listed as endangered, and has become a popular destination for ecotourists.

 

In July 2024 the site was declared a UNESCO World Heritage Site for its exceptional beauty and the fact that it is a unique natural aspect in the world.

 

Fresh water collecting in the valleys between sand dunes in the Lençóis Maranhenses National Park in Brazil. A layer of rock beneath the sand prevents the rain water from dissipating during the rainy season, resulting in a broad expanse of lagoons.

 

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Federal level Lençóis Maranhenses National Park, located in Primeira Cruz (MA), Barreirinhas (MA)

 

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Physical geography

The park is located on the northeastern coast of Brazil in the state of Maranhão along the eastern coast, bordered by 70 kilometres (43 mi) of beaches along the Atlantic Ocean.:  80  Inland, it is bordered by the Parnaíba River, the São José Basin, and the rivers of Itapecuru, Munim, and Periá.:  80  The park encompasses an area of 155,000 hectares (380,000 acres), composed mainly of expansive coastal dune fields (composed of barchanoid dunes), which formed during the late Quaternary period.

 

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the flooded sand dunes 

 

 

 

 

 

 

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Lençóis Maranhenses National Park, Brazil

 

These sand dunes only exist because the ocean is so close by, but that's not saltwater we're seeing. Brazil's remote Lençóis Maranhenses National Park is famous for its freshwater lagoons, which fill the dips and valleys amid the dunes each rainy season.

Whether you witness them from high above or jump right in for a swim, the interlocking crystalline pools form a surrealist masterpiece that's forever in flux. The lagoons, slowly but surely, will evaporate into shallow puddles by autumn, only to be replenished when stormy weather returns next spring and summer.