Here’s a cool fact to share with children visiting Machu Picchu in Peru—the place probably would never have been discovered without the help of a kid just like them. You see, after two years ...

In a way he was right, with Machu Picchu being the nation’s hottest tourist hot spot. Too much so: In 2008, it was deemed an endangered site, and access was reduced to 2,500 visitors per day.