The Lençóis Maranhenses National Park is located in Maranhão state, in north-eastern Brazil. Composed of large, white, sweeping dunes, at first glance Lençóis Maranhenses looks like a desert, but receives regular rainfall that causes freshwater to collect between the dunes; the translucent pools are home to a variety of fish (their eggs are brought from the sea by birds). The park was created in 1981 and is in the state of Maranhão, south of the mouth of the Amazon River. The blue and green lagoons reach their fullest between May and September to the delight of visitors. The best period to visit is the months of June and July. The water of the lagoons is warm and great for a swim. The landscape is a surreal Daliesque landscape where, despite the rain, supports almost no vegetation. It can be seen on a tailor-made tour combined with the historic city of San Luis, and the unspoilt beaches of Brazil’s NE coast.