Woman relaxes in a natural rain water pool, Lencois Maranhenses, Maranhao, Brazil, South America

underwater lencois maranhenses maranhao brazil rain ponds sand dunes pond dune beach rainwater fresh water freshwater woman women lencois maranhenses national park national parks parque nacional dos lencois maranhenses surface surface level people one person one woman only tourist tourists tourism ponds water dunes beaches shadows day outdoors south america swimming looking at camera horizontal