1. Salar de Uyuni: The Place Where the Ground Becomes the Sky
Location: Bolivia
Try finding the horizon here. When a thin layer of still water covers Bolivia’s enormous salt flat, the clouds overhead appear beneath your feet. People and vehicles can seem to float in the middle of an endless sky. It is the kind of scene that makes your brain search for the edge of a movie set.
The effect starts with a remarkably flat surface left behind by ancient lakes. Rainwater spreads across the salt crust, creating a giant reflecting surface. With calm conditions and the right light, the boundary between land and sky becomes surprisingly difficult to pick out.
The mirror does not stay switched on all year. During dry conditions, much of the landscape becomes a white expanse of salt, often patterned with polygonal ridges. That version has its own trick: the lack of familiar landmarks makes distance difficult to judge, which is why people take those photos of tiny friends appearing to stand beside enormous toy dinosaurs.
