The famous mirror effect on the Salar de Uyuni usually appears during the rainy season, particularly from January to March, when a thin layer of water can cover the salt crust. Under calm conditions, the water reflects the sky so clearly that the horizon almost disappears, creating the iconic mirror-like landscape. However, the effect depends on recent rainfall and local weather conditions, so it cannot be guaranteed on every visit. Water levels can also affect access to certain areas of the salt flats, making conditions an important factor when planning your trip.