Lençóis Maranhenses National Park, Maranhão, Brazil

Located on the eastern coast of the state of Maranhão by the banks of the Preguiças River, the park embraces the municipalities of Humberto de Campos, Primeira Cruz, Santo Amaro and Barreirinhas, the latest serving as the main jumping off point into the protected park.
There are several regular bus/truck routes between Barreirinhas and São Luís, Brazil (Maranhão's capital), a distance of about 260km. There are also air taxis from São Luís to Barreirinhas. The Rio Preguiças river connects the park to Atins, a city at the edge of the park. The most important access roads near the park are BR-135, BR-222, MA-404, MA-225, and
The National Park is quite extensive and has no access roads. Because of the nature of the park's protected status, most vehicles are not permitted access. Entrance to the park is made exclusively by 4-wheel drive trucks.