One of the most stunning places on this planet, (on par with Salar de Uyuni, Chilean Patagonia, the Galapagos, San Blas Islands, the cascades of Hierapolis, and the Yukon Territory) this national park is located in the Northeastern Brazilian state of Maranhao. It encompasses about 580 sq miles and is a seamless mixture of Sahara-like sand dunes with crystal clear sweet water lagoons.