The Zapotec civilization, one of Mesoamerica's earliest societies, built Monte Alban, among North America's first major cities. This urban center housed 25,000 people and endured for over 1,200 years.

Archaeologists uncover tunnels beneath a Mexican church, believed to be the "entrance to the underworld" by the ancient Zapotec civilization. Named the "place of the dead," Mitla once housed ...