Edinburgh, Scotland is a thriving metropolis, but take a look into its past, and you'll find it has led a double life.

Cities of the Underworld

Scotland's Sin City

Berlin, Germany was the battlefield of the 20th century, and today, sealed up and forgotten beneath its streets are the remnants of a dark past.

Hitler's Underground Lair

Rome is a city where the past meets the present on every corner. A secret cult practiced right next to the Circus Maximus, and their temple still remains beneath the street.

Rome's Hidden Empire

Beneath the hustle and bustle of Paris streets is a world of snaking quarries, hidden catacombs, and mushroom-harvesting tunnels. Even Paris' 10.5 million residents have no idea they live on top of nearly 20 centuries of history.

Catacombs Of Death

Discover an ancient secret that dates back to the dawn of time lurking beneath the city of Budapest, Hungary.

City of Caves

Once the capital city of three of the world's most powerful empires, today Istanbul's residents are walking on top of remnants of these fallen civilizations...literally.

Istanbul

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

New York

For thousands of years London has been among the most powerful cities in the world. However, below the busy streets and marketplaces another city hides.

London's Lost Cities

Naples, Italy narrowly escaped meeting the same fate as its neighboring city, Pompeii in 79 AD when Mount Vesuvius wiped out everything around it.

Beneath Vesuvius

Discover the fascinating and unknown history that lies below major cities around the world today.

Freemason Underground

Rich in legends and folklore visit the city of Bucharest, Romania and learn about its most famous citizen, Vlad the Impaler, more commonly known as Dracula.

Dracula's Underground

Cappadocia is where East meets West, setting the stage for bloody battles and ruthless land wars. This landscape in modern day Turkey is unlike any other in the world.

Secret Pagan Underground

100 years ago Portland, Oregon was America's Sodom, a city full of vice, considered the most dangerous port in the world.

Underground Bootleggers

What was the secret to the success of ancient Rome? Aqueducts, underground neighborhoods and one of the oldest sewer systems reveal many secrets.

Rome: The Rise

Pluto

Prague is a city cloaked in mystery, with an underground to match. Medieval castles line the streets and hide dark dungeons deep below them.

Hitler's Last Secret

For billions of people across the globe, Jerusalem is considered ground zero for Armageddon.

Underground Apocalypse

Be careful where you walk--history's afoot! See a Vietnam that you've never seen before.

Vietnam

Tokyo, Japan is a city straight out of the future, above ground.

A-Bomb Underground

Dublin, Ireland is much more than a city full of pubs and pints.

Viking Underground

Belize was the nerve center of the ancient Mayan civilization. Hundreds of ruins dot the landscape and reveal clues to bloody rituals.

Maya Underground

Chicago 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.

Mob Underground

Today, New York is the biggest city in the country... but it's got some dark secrets in its past. It was founded by covert groups, overrun with gangs and mob bosses.

New York: Secret Societies

Washington D.C. is headquarters for one of the most powerful governments in the world. Decisions that reverberate around the world are made here.

Washington, DC: Seat of Power

Moscow is a city known for its ruthless leaders and abundant secrets. Today it's a modern metropolis.

Stalin's Secret Lair

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.

Katrina

Deep within the former Soviet Union lays a classified, subterranean world of Cold War secrets.

Secret Soviet Bases

Cities of the Underworld descends below the streets of major cities such as New York, Cairo, London, and Tokyo to explore the remnants of subterranean civilizations left buried there.

Hitler's Last Secret

Full Episodes

Season 2, 12 episodes