Don't bother with a one-day trip if you have time. The 3-day tour hits the colored lagoons and geothermal fields that make the long drive to Uyuni actually worth it. Aim for the rainy season if you want that viral mirror effect shot. Bring layers because the desert air drops below freezing at night. Skip the budget group tours if you want a decent bed; booking a private vehicle saves your sanity on the bumpy salt flats.
