Machu Picchu Pt. 1: Wonder of the World

In the early 20th century, a history professor from Yale introduced the world to Machu Picchu—an ancient Incan city built atop the Andes Mountains. The now-legendary site is a feat of engineering, hydrology, and physics. It’s also a place of mystery, posing questions that have baffled scholars for years.  Learn more about your ad choices. Visit podcastchoices.com/adchoices