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 ripple ripples woman women relaxation relaxing floating shadow 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 horizontal