Part 5/10:
Heading to northeastern Brazil, we arrive at Lençóis Maranhenses National Park, famous for its surreal landscape of sand dunes interspersed with crystal-clear lagoons during the rainy season. This otherworldly area, featured in films such as "The Avengers," is ideal for swimming, kiteboarding, or simply marveling at the natural beauty. The best time to visit is between June and September, when the lagoons are at their fullest.