Machu Picchu is formed of buildings, plazas, and platforms connected by narrow lanes or paths. One sector is cordoned off to itself by walls, ditches, and, perhaps, a moat—built, writes ...

Literally "old mountain" in Quechua, Peru's dominant indigenous language, Machu Picchu is built into peaks more than 2,400 meters above sea level in southern Peru, where the Andes and the Amazon ...