Its 200 structures were built with granite blocks shaped to fit together so perfectly that no mortar was needed. The fact that Machu Picchu remains remarkably intact also speaks to the Incas ...

The Machu Picchu Management Unit (UGM ... parts of the world staged a protest Wednesday which went as far as to block the railway connecting Cusco with the citadel in the middle of the Andes.

Inca mastery of landscape and environment is epitomised at Machu Picchu, their most famous ruin. Many archaeologists believe Machu Picchu was a summer retreat for the emperor and his family.