The Lencois Maranhenses National Park is located in Maranhao state, in northeastern Brazil. It is an area of low, flat, occasionally flooded land, overlaid with large, discrete sand dunes. It encompasses roughly 1500 square kilometers, and despite abundant rain, supports almost no vegetation. Continue reading for a video, more pictures, and additional information.

Composed of large, white, sweeping dunes, at first glance Lencois 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.