There are some dry places on our planet. Some places receive less than 250 millimeters of precipitation per year which is less than is needed to sustain most plant and animal life. These places are called deserts. The link below shows some of the most unique deserts on earth including the Lencois Maranhenses, in Brasil, which accumulates the moisture that falls in the winter into shallow lagoons between the giant sand dunes.
Composed of large, white, sweeping dunes, at first glance Lençóis Maranhenses looks like an archetypal desert. In fact it isn’t actually a desert. Lying just outside the Amazon basin, the region is subject to a regular rain season during the beginning of the year. The rains cause a peculiar phenomenon: fresh water collects in the valleys between sand dunes, spotting the desert with blue and green lagoons that reach their fullest between July and September.
The area is also surprisingly home to a variety of fish which, despite the almost complete disappearance of the lagoons during the dry season, have their eggs brought from the sea by birds. (Wikipedia)
-Mike
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