Emma Dahlströmand Jesper Tjäder are both professional free-skiers who compete on the Swedish National Ski Team. In their careers, the pair has travelled around the world to ski some of the steepest, iciest and gnarliest slopes. But they had never experienced anything like the sheer vertical madness they took on during a recent trip to Peru. There, they shredded the sandy hillsides of Huacachina and Cerro Blanco — the highest sand dune in the world. Watch this video by Great Big Story to discover what it’s like to ski on sand.