Visit Chan Chan

Stand among the cloud-wrapped ruins of Machu Picchu, the 15th-century Inca citadel perched high above Peru's Sacred Valley

Walk among the 5,000-year-old pyramids of Caral, the oldest known city in the Americas

Descend into the underground galleries of Chavín de Huántar to meet the Lanzón, a 3,000-year-old fanged god

Watch the sun rise along the Thirteen Towers of Chankillo, a 2,300-year-old solar calendar in the desert

Fly over the Nazca Lines, giant desert figures etched into Peru's coastal plain two thousand years ago

Walk the streets of a Roman city frozen mid-life by Vesuvius in 79 AD — ruts, frescoes, bakeries and all

Xi'an's buried army of clay warriors.

Set eyes on Río Abiseo, the UNESCO park almost nobody may enter — cloud-forest ruins and a monkey back from the dead