In Bolivia, there is a world-famous salt lake called Uyuni. During the rainy season from December to February, the surface water of the salt layer will form a visually stunning mirror effect in the absence of wind, and the boundaries of the world within 360°. Blurring, the "mirror of the sky" got its name. There are only 300 tourists per day, the transportation is inconvenient, the facilities for travel are not complete (the wireless network is broken all day), but it is the highest paradise for photographers. (Because the network is still unstable, and on the other side of the globe, the time is black and white reversed, a few advance notices.