March 31, 2011
Photograph by Robert Clark, National Geographic
This Month in Photo of the Day: National Geographic Magazine Features
Perched high in the Peruvian Andes, the royal retreat of Machu Picchu testifies to the Inca's masterful building skills with its precision-cut stones and perfectly placed cascades of terraces.
See more photographs from the April 2011 feature story "Lofty Ambitions of the Inca."
Buy a print of this photo