Lençois Maranhenses National Park, Brazil
These swathes of sweeping white dunes create an otherworldly landscape, and from May to September, rainwater fills the crystal-clear pools. These dunes span over 43 miles or 70 kilometers. In Portuguese, the name translates to rolling white dunes. Wandering across this heavenly landscape is an experience unlike any other. Why travel to another planet when you have these sprawling dunes in South America, right at your doorstep? (CNN).