Mountain biking down the world's highest sand dune

https://www.todomountainbike.net/art/epico-descenso-de-kilian-bron-por-cerro-blanco-una-de-las-dunas-mas-altas-del-planeta
https://www.redbull.com/fr-fr/kilian-bron-vtt-cerro-blanco-mission-video