This article was originally published on mentalfloss.com as 13 Amazing Facts About Machu Picchu ... the kingdom of Cusco into the vast Inca empire. For more than a century, researchers ...

Men aged 15 to 50 were required to donate a portion of their time to the empire’s various construction projects, everything ...

"Land of the Four Quarters" or Tahuantinsuyu is the name the Inca gave to their empire. It stretched north to south some 2,500 miles along the high mountainous Andean range from Colombia to Chile ...

"Land of the Four Quarters" or Tahuantinsuyu is the name the Inca gave to their empire. It stretched north to south some 2,500 miles along the high mountainous Andean range from Colombia to Chile ...

Its long tail provides a very different shape from that of the ground-dove, but beware of the Inca dove’s regrowing lost tail; it can be mistaken for a ground-dove, and the dark bill along with ...