Lagoa Azul (Blue Lagoon) and sand dunes, Parque Nacional dos Lencois Maranhenses, Brazil, South America

blue lagoon brazil color image contemporary day dunes geology horizontal lagoa azul lake lakes landscape landscapes national parks natural world nature nobody outdoors parque nacional dos lencois maranhenses photography physical geography sand sand dunes sandy scenics shapes south america surface processes topography travel travel destinations americas brazilian color colour daytime outside south american water