Cities of the Underworld

Evidence of the apocalypse is under the holy city of Jerusalem; host Don Wildman gains special access to a sacred stone said to protect the world from ultimate chaos.

Exploring Vietnam War-era tunnels, passages and secret caves used as shelters; the massive Cu Chi tunnel system; superbunkers.

Technology beneath the streets of Tokyo is to protect the city from natural disasters; Hiroshima's underground affords shelter from World War II's most powerful bombs; the secret life of Japanese ninjas.

Prague, Czech Republic: quarries in which Adolf Hitler may have stored his most powerful secret weapon; mines that doubled as Communist slave camps.

Explorers uncover Mayan tombs, sacrificial altars, caves and entrances to the ancient civilization's underworld in the jungle of Belize, where hundreds of ruins dot the landscape.

A history of Chicago reveals vice dens, secret railroad lines, shipwrecks, and the spark that led to the atomic bomb.

Delving into Jerusalem's subterranean landscape uncovers an ancient escape route, a secret bullet factory, and data linked to the holy city's most-mysterious, most-enduring prophecies.

Dan Wildman explores the gangs, mob bosses, covert groups, and secret societies of early New York City; Wildman delves into the secret world of "sand hogs," mobster hideaways, hidden tunnels, and escape routes.

Exploring the top-secret underground defenses of Washington, D.C.; how the U.S. prepares for the worst possible scenarios, from a nuclear catastrophe to the ravages of disease.