National Geographic : 1916 May
Photograph by H.L.Tucker WHEAT AND BARLEY FIELDS ON THE SLOPES ABOVE THE URUBAMBA VALLEY Across the middle of the picture runs one of the great highways of the region that has its center inthe city ofCuzco. The culture of the Incas may be said to have resulted largely from their success in domesticating the alpaca and the llama. They were domesticated so long ago that no wild members of the species remain. Using hundreds of thousands of beasts ofburden capable of carrying from fifty to one hundred pounds apiece, the Incas were able to carry out their splendid engineering and agricultural work.