Salar de Uyuni

The world's largest salt flat — 10,582 square kilometers of blinding white crust in southwestern Bolivia. During the wet season (December-April), a thin layer of water transforms it into the world's largest natural mirror, reflecting the sky so perfectly that the horizon line disappears. The forced-perspective photography opportunities are endless: dinosaur toys eating tourists, people standing on Pringles cans. It's the most Instagrammable natural phenomenon on the planet.