Sand dunes around Gaivota Lake at Lencois Maranhenses National Park, Santo Amaro, Maranhao, Brazil, South America

abstract desolate desolation dunes dune gaivota lake gaivota horizontal lencois maranhenses national park lencois maranhenses np lake lakes landscape national park national parks parque nacional dos lencois maranhenses remote sand sand dunes sand dune sandy travel water abstracts lencois maranhenses landscapes day outdoors scenics nature natural world topography physical geography surface processes geology maranhao brazil south america santo amaro