Lençóis Maranhenses National Park

Northeastern Brazil's Maranho state contains the Lençóis Maranhenses National Park (Parque Nacional dos Lençóis Maranhenses[a]), which is located just east of the Baa de So José. The 155,000 ha (380,000 acres) park was declared protected on June 2, 1981. 

                                  

Its interior is made up of rolling sand dunes, and its 70 km (43 mi) of shoreline. Freshwater lagoons accumulate in the valleys between the sand dunes during the wet season because the impervious granite underneath prevents them from draining. The park has grown to be a well-liked destination for ecotourists and is home to a variety of species, including four that are categorized as endangered.

The park is surrounded by 70 kilometers (43 mi) of beaches along the Atlantic Ocean on Brazil's northeastern coast in the state of Maranho on the eastern coast. The Parnaba River, the So José Basin, the Itapecuru, Munim, and Periá Rivers all form its internal borders. [5]: 80 The park's 155,000 hectares (380,000 acres) are primarily made up of vast coastal dune fields made up of barchanoid dunes that originated in the late Quaternary.

Up to 60,000 people, every year visit the Lençóis Maranhenses National Park. At the park, surfing, kayaking, and horseback riding are popular pursuits.