"One of history's greatest engineering feats is one you rarely hear of. It's the Inca Road, parts of which still exist today across much of South America."

"Back in the day — more than 500 years ago — commoners like me wouldn't have been able to walk on the Inca Road, known as Qhapaq Ñan in the Quechua language spoken by the Inca , without official permission."

"Fortunately, I have Peruvian archaeologist Ramiro Matos by my side. He is the lead curator of an exhibition at the National Museum of the American Indian called 'The Great Inka Road: Engineering an Empire.'"