Cities Of The Underworld Season 5 is yet to be announced by History Channel

Host Don Wildman explores underground Sydney, including a 19th-century prison, caves that were once home to fugitive outlaws, and gold mines. Also, a secret World War II storage place for chemical weapons is toured by those who once worked there.

A history marked by conquest and conflict leaves a rich mythology of gods and men beneath the soil of Turkey. Host Don Wildman focuses on the remnants from invasions and travelers on the trade routes plus investigating the truth behind legends of the Trojan War.

Host Don Wildman explores ancient structures buried beneath the desert sands of Egypt and the streets of Cairo, examines how these engineering marvels survived invasions, and discovers a tomb filled with 2,000-year-old mummies. Also examined: the Book of the Dead and a step pyramid built a century before the Giza pyramids.

Host Don Wildman explores underground San Francisco, including an ammunition depot, a former repository for nuclear missiles, Civil War fortifications beneath Alcatraz, and tunnels below Chinatown.

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.

Host Don Wildman explores ancient Rome, focusing on places associated with gladiators, including the Colosseum, brothels, and crypts. Also: a school where gladiators learned how to fight and survive.

Host Don Wildman explores underground Los Angeles, including 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 city war rooms ready for the next big quake.

Explore life beneath the streets in Europe after the fall of the Roman Empire. 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."

Don Wildman travels to Belgium where he explores the subterranean web of World War 1 trenches and bunkers.

Host Don Wildman explores underground Las Vegas, including secret surveillance centers for casinos, underground vaults, and tunnels used during the Prohibition era.

Host Don Wildman travels to Sicily to trace the Mafia's roots back to a secret vigilante society in an underground network that was created to put corrupt city officials on trial and execute the guilty. Included: the escape route of a mob boss; a bone crypt; and bunkers used during World War II by the Axis powers.

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. He dives to the USS Emmons, a destroyer sunk off Okinawa's coast.

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

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.

Inflicting over $80 billion in damage, and causing the deaths of over 1,800 people, Hurricane Katrina was among the greatest engineering disasters in US history. But was Katrina the "big one" New Orleans had been waiting for? Many believe the "perfect storm" is yet to come. If and when the big one does hit, will New Orleans be ready? The answers are in the underground. From the Army Corps' latest levees to last-ditch efforts to use save New Orleans' vanishing wetlands, we're going deep into New Orleans' underground to see where New Orleans stands, and if it stands a chance.

Don Wildman ducks behind the Iron Curtain into Moscow to show how the Soviets were preparing for a nuclear war back during Stalin's regime. He looks at the underground of Moscow, including the areas relating to the Cold War and Stalin's ruthless reign. This includes a glimpse of hidden bunkers and escape tunnels used to hide from Stalin's henchmen.

Don Wildman discovers high tech bunkers and explores the ancient sewer system under Washington D.C., shows subterranean defenses against possible future nuclear holocost and a secret civil war encampment. Also re-aired under the name "Preparing For Doomsday".

New York City is the biggest city in the country, but it's got some dark secrets. Founded by covert groups, overrun with gangs and mob bosses, and ruled by secret societies, this is the true foundation of the city that never sleeps.

The ancient world was shaped by people who believed they foresaw the will of God. Jerusalem is at the heart of all their fiery prophecies. From bloody wars to the birth of saviors, Jerusalem has been at the center of prophetic revelations.

Chicago, Illinois was once a playground for mobsters and corrupt politicians. It wouldn't be the third-largest city in the U.S. today if it weren't for the shady dealings that went on just beneath its streets.

Visit the center of the Mayan civilization. Hundreds of ruins scatter the landscape and reveal clues to bloody rituals, advanced architecture, and belief in an unforgiving underworld of Mayan gods.

Be careful where you walk--history's afoot! Prague in the Czech Republic is a city cloaked in mystery, with an underground to match. Medieval castles line the streets and hide dark dungeons deep below them. From quarries where Hitler may have stored his most powerful secret weapon to mines that doubled as Communist slave camps, Prague has surprising stories to tell. Join host Don Wildman as he reveals the technological marvels that allowed the construction of one city upon another-- literally.

Dublin, Ireland is much more than a city full of pubs and pints. Pagan burial tombs, subterranean defense tunnels, and mysterious burial crypts line the underground below the rolling hills. Even an underground river runs through the heart of the city where you'd least expect to find it.

Don Wildman investigates World War II bunkers in Hiroshima Japan, takes viewers below the streets of Tokyo to see how flooding is handled and what they are doing to protect Tokyo's infrastructure from the Big One!

See a Vietnam that you've never seen before. During the Vietnam War, the media flooded the world with images of soldiers and jungles. What wasn't seen were the tunnels, caves, and passageways.

For billions across the globe, Jerusalem is considered ground zero for Armageddon. While most of the world's population believes it a holy land, it's also one of the bloodiest cities the world has ever known. Host Don Wildman gains special access to a sacred stone said to protect the world from ultimate chaos. From a hidden occult city built by the Knights Templar to the hiding place for the Dead Sea Scrolls, the evidence of the apocalypse is buried all over the holy city.

What was the secret to the success of ancient Rome? Aqueducts, underground neighborhoods, and one of the oldest sewer systems reveal many secrets. The largest and most influential empire in history leaves clues to her greatness under nearly every street.

One hundred years ago, Portland, Oregon was a city full of vice, considered the most dangerous port in the world. It was a place where you could get drugs or booze or wake up trapped in a cell beneath the earth.

Four thousand years ago, a mysterious pagan society called the Hittites dug deep into the soft volcanic rock, called tufa, to carve out an intricate underworld. But after almost 800 years of rule, the Hittite Empire vanished without a trace. Where did their people go and what clues have they left behind in their complex subterranean world of Cappadocia?

Visit the city of Bucharest, Romania and learn about its most famous citizen, Vlad the Impaler, more commonly known as Dracula. Travel underground as host Don Wildman explores secret prisons, caves, and dungeons. Only through the bleak subterranean stretches can one come face-to-face with the truth about this infamous Romanian ruler.

Boston and Philadelphia are renowned for their part in America's revolutionary saga, but these cities harbor an unseen connection ... the Freemasons. From the whispers of hidden tunnels and tombs beneath Boston's North End to the incredible waterworld still intact under Philadelphia, the legendary secret society has left behind the blueprints to America's rise. And their enigmatic influence stretches from the Revolutionary Battles of Fort Mifflin to the secret struggles of the Underground Railroad. Host Don Wildman receives exclusive access to newly discovered sites and clues and delves into a part of America's past that can only be revealed in the underworld. We're peeling back the layers of time on Cities of the Underworld: The Freemason Underground.

Naples, Italy narrowly escaped meeting the same fate as its neighboring city, Pompeii in 79 AD when Mount Vesuvius wiped out everything around it. The wind saved Naples that day, but life in the shadow of this massive volcano is unlike any other--and so is it's underground. Explore the neighborhoods, banks, bakeries, and other structures carved beneath Naples by ancient Neopolitans.

For thousands of years, London has been among the most influential cities in the world. Below the busy streets and marketplaces, another city hides--a city of Roman baths, secret crypts, lost rivers, indestructible bunkers that could hold up to 8,000 people, and Winston Churchill's hidden war-rooms; host Eric Geller.

Explore beneath New York City, a living, breathing complex of engineering, history, and secrets that could only exist in America's largest city.

Explore the caves beneath the city of Budapest, Hungary.

Snaking quarries, hidden catacombs, and mushroom-harvesting tunnels lie beneath the city of Paris.

Host Eric Geller discovers what life was like during Nero's tyranny and Augustus' reforms.

This program reviews Adolf Hilter's and Albert Speer's plans for a building boom that would turn Berlin into the capital city of the world. The plan included substantial below ground structures. They built strong and despite the bombing campaigns of World War II a substantial part of the underworld survives for host Eric Geller to explore.

Travel beneath the streets of Edinburgh and discover what has been forgotten, including the remains of body snatchers and outlaw distilleries.

Istanbul is undoubtedly one of the most dynamic and exotic cities in the world. Once the capital city of three of the world's most powerful empires--The Roman, Byzantine, and Ottoman--its strategic location made it the perfect spot for empires to rise, fall...and rise again. Residents of Istanbul walk on top of remnants of these fallen civilizations...literally. Taxis drive over parts of Constantine's Lost Great Palace; children play on cobblestone streets concealing a massive Byzantine dungeon; a high school sits on a 3rd-century wall leading to the bowels of a 100,000 seat ancient Roman Hippodrome; and basement's of old Ottoman homes lead to subterranean tunnels and secret cisterns. Join host Eric Geller as he leaves the buzz of the city streets behind and follows the pull of the past. Teamed with leading archeologists and experts, host Eric Geller peels back the layers of the past--to reveal a hidden history that hasn't seen the light of day for ages.