Cities of the Underworld

Discoveries lie under the streets of today's greatest cities.

America's Military Underground

S4 E2

Don explores top-secret military and government tunnels.

Murder Tunnels

S4 E3

Don uses brand-new mapping technology to expose the dark and deadly uncharted spaces beneath American cities.

America's Ancient Ancestors

S4 E4

Don goes deep beneath the great lakes and explores flooded caves as he searches for evidence of a mysterious, cave-dwelling society that may have been the first people to reach America.

The Pirate Queen's Lair

S4 E5

Don explores newly discovered ruins and caves in Croatia as he uncovers the true story of a formidable queen who dared to defy the powerful Roman Empire.

Templars and the Founding Fathers

S4 E6

Don goes deep beneath a Knights Templar stronghold in Turkey to explore a provocative theory that may link the fabled secret society to the founding fathers of America.

Secrets of the Ancient Metropolis

S4 E7

Don explores the massive underground cities in the mountains of Turkey that may have been home to the first civilization on Earth.

The Lost Aztec Colony

S4 E8

Don follows the clues hidden underground as he searches for evidence of 10,000 Aztecs who fled Mexico and disappeared somewhere in America.

City of Blood

S3 E1

Don Wildman explores London, England, above and below ground to uncover its violent crimes, extreme poverty and lawlessness during the chaotic Victorian period.

Tunnels of Hell

S3 E2

Host Don Wildman discovers what it was like to live through World War II's Battle of Okinawa by exploring the Japanese defenders' tunnels, caves and bunkers; diving to a destroyer sunk off Okinawa's coast.

Real Mafia Underground

S3 E3

Host Don Wildman travels to Sicily to trace the Mafia's roots back to a vigilante secret society in an underground network that was created to put corrupt city officials on trial and execute the guilty.

Secret Sin City

S3 E4

Host Don Wildman explores the secret underground that helped transform Las Vegas from a barren desert into a mobster metropolis; underground vaults; secret surveillance nerve centers.

Hitler's Trenches

S3 E5

Host Don Wildman explores the trench systems and fortifications that made World War I one of the most brutal wars in history and helped shape Nazi Germany's Adolf Hitler.

Barbarians' Lair

S3 E6

Host Don Wildman tracks down subterranean secrets from Europe's Dark Ages, including a secret society's immense quarries, Templar torture chambers and the tunnels of medieval "ghost knights."

Land of Manson

S3 E7

Underground Los Angeles includes a haven for killer Charles Manson and his followers, tunnels where corrupt cops secretly ran the city, a dormant subway system, coastal military bunkers and war rooms ready for the next big quake.

Gladiators: Blood Sport

S3 E8

Digging into the secret lives of ancient Roman gladiators, ranging from the depths of the Flavian amphitheater to a buried brothel where they lived their last days; host Don Wildman visits ancient crypts and chambers used for pagan worship.

Secret Holy Land

S3 E9

Christianity evolves in unique ways in Ethiopia's ancient underground engineering marvels and remote, cliffhanging caves; emperors' tombs; subterranean cathedrals; the Queen of Sheba's buried palace; possible site of the Ark of the Covenant.

Under the Rock

S3 E10

San Francisco is one of the nation's largest military defense installations with a huge underground ammunition depot, a former nuclear arsenal and Civil War fortifications buried under Alcatraz; human trafficking tunnels in Chinatown.

Gods of War

S3 E12

A history marked by conquest and conflict leaves a rich mythology of gods and men beneath the soil of Turkey; host Don Wildman investigates the truth behind legends of the Trojan War.

Alcatraz Down Under

S3 E13

Australia's past had convicts transported from Britain, gold miners and outlaws; a 19th-century prison housed Sydney's most-dangerous criminals; a cave complex sheltered outlaws.

Underground Apocalypse

S2 E1

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.

Vietnam

S2 E2

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

A-Bomb Underground

S2 E3

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.

Viking Underground

S2 E4

Exploring mysterious tombs, defense tunnels and an underground river beneath Dublin, Ireland.

Hitler's Last Secret

S2 E5

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

Maya Underground

S2 E6

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.

Mob Underground

S2 E7

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

Prophecies From Below

S2 E8

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.

New York: Secret Societies

S2 E9

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.

Washington, D.C.: Seat of Power

S2 E10

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.

Stalin's Secret Lair

S2 E11

Reminders of former Soviet leader Josef Stalin's terrifying legacy lie beneath the streets of Moscow in a subterranean web so vast that the Russian capital is in danger of caving in.

Secret Soviet Bases

S2 E13

Host Don Wildman digs into the subterranean world of Cold War secrets in Ukraine, where the former Soviet Union stockpiled nuclear weapons, established submarine bases and built underground apartment blocks.