2. Machu Picchu – A Sacred City Being Trampled
High in the Andes, Machu Picchu was hidden from the world for centuries. Now, it welcomes over a million visitors a year—and that’s the problem.
Trampling feet, shifting stones, and weather extremes are causing slow but irreversible damage. Even UNESCO threatened to put it on the “endangered” list. The irony? What was once lost to time may be destroyed by discovery.