Located east of Baía de São José, Lençóis Maranhenses looks nothing like a usual desert. In fact, it’s more like an endless piece of pure white, almost flat land. At first look, one may say it’s a unique type of desert. After all, it is a 580 square miles of sand dunes, with frequent rain and zero vegetation. It is one of the most fascinating national parks worldwide. The area is located close to the Amazon Basin, which makes it prone to plenty of rain at the beginning of each year. During each rain season, freshwater gathers in the valleys between sand dunes.