Katrina Underground: When Hurricane Katrina hit, parts of New Orleans were devastated. Does the key to protecting the city from global warming lie in its historical underworld?
Maya Underground: Hundreds of ruins over a scattered landscape reveal clues to the Mayan civilisation. Gods and bloody rituals mark their shocking underworld.
Maya Underground: Hundreds of ruins over a scattered landscape reveal clues to the Mayan civilisation. Gods and bloody rituals mark their shocking underworld.
Mob Underground: Chicago may be the third largest city in the USA, but it was a city built on shady dealings. Discover how it was a playground for mobsters.
Underground Apocalypse: From a hidden occult city built by the Knights Templar to the hiding place for the Dead Sea Scrolls, Jerusalem's underworld hides many mystifying secrets.
Stalin's Secret Lair: Moscow is a city known for its ruthless leaders and abundant secrets. Below its streets lie reminders of its war-torn past, and Stalin's terrifying legacy.
Stalin's Secret Lair: Moscow is a city known for its ruthless leaders and abundant secrets. Below its streets lie reminders of its war-torn past, and Stalin's terrifying legacy.
Hitler's Last Secret: Delve beneath the streets of some of the planet's most famous cities to explore the subterranean secrets concealed beneath the seemingly mundane streets.
Hitler's Last Secret: Delve beneath the streets of some of the planet's most famous cities to explore the subterranean secrets concealed beneath the seemingly mundane streets.
A-Bomb Underground: Venture beneath the busy streets of Tokyo to uncover state of the art technology, designed to save the city from the many natural disasters that could strike.
A-Bomb Underground: Venture beneath the busy streets of Tokyo to uncover state of the art technology, designed to save the city from the many natural disasters that could strike.
Vietnam: Discover the hidden underworld of Vietnam. A collection of secret tunnels, natural caves and passageways all used by the Viet Cong command during the war.
Secrets Of The Ancient Metropolis: Don explores the massive underground cities in the mountains of Turkey that may have been home to the first civilisation on Earth.
The Lost Aztec Colony: Don follows clues hidden underground as he searches for evidence of 10,000 Aztecs who fled Mexico and disappeared somewhere in America.
Templars And The Founding Fathers: Don goes beneath a Knights Templar stronghold in Turkey to explore a theory that may link a secret society to The Founding Fathers of America.
The Pirate Queen's Lair: 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.
America's Military Underground: Don explores top-secret military and government tunnels and looks into classified technology that could be used to build cities under our feet.
Secret Pagan Underground: Cappadocia: The castles and dungeons of the Hittites are hidden beneath the sandy lunar landscape of Cappadocia. Why did this ancient empire fall?
Rome's Hidden Empire: Host Eric Geller discovers what life was like during Emperor Nero's tyrannical reign and Augustus's reforms by peeling back the hidden history of Rome.
Secrets Of The Ancient Metropolis: Don explores the massive underground cities in the mountains of Turkey that may have been home to the first civilisation on Earth.
The Lost Aztec Colony: Don follows clues hidden underground as he searches for evidence of 10,000 Aztecs who fled Mexico and disappeared somewhere in America.
Templars And The Founding Fathers: Don goes beneath a Knights Templar stronghold in Turkey to explore a theory that may link a secret society to The Founding Fathers of America.
The Pirate Queen's Lair: 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.
America's Ancient Ancestors: Don goes deep beneath the great lakes and explores flooded caves as he searches for evidence of a mysterious, cave-dwelling society.
America's Military Underground: Don explores top-secret military and government tunnels and looks into classified technology that could be used to build cities under our feet.
Beneath Vesuvius: Naples: Naples is a time capsule of ancient life, with banks, bakeries and even Nero's famous stage hidden under the streets and in the caverns of Vesuvius.
Secret Pagan Underground: Cappadocia: The castles and dungeons of the Hittites are hidden beneath the sandy lunar landscape of Cappadocia. Why did this ancient empire fall?
Scotland's Sin City: From plague victims being buried alive, to body snatchers, illegal distilleries and castle dungeons, Edinburgh's underground world has many stories to tell.
Rome: The Rise: Beneath the modern city streets, ancient underground neighbourhoods and sewerage systems reveal the technological marvels that helped advance an empire.
Rome's Hidden Empire: Host Eric Geller discovers what life was like during Emperor Nero's tyrannical reign and Augustus's reforms by peeling back the hidden history of Rome.
Hitler's Underground Lair: Berlin: Eric Geller travels through the damp recesses of Berlin's secret bunkers. Engineered by the Nazis during WWII, their dark past is revealed.
Freemasons Underground: Boston & Philadelphia: From hidden tunnels beneath Boston to a waterworld under Philadelphia, the Freemasons left behind the blueprints to America's rise.
Dracula's Underground: Bucharest: From secret prisons to escape tunnels, ancient caves to mines, Bucharest is ripe with folklore. Discover the history of its underworld.
City of Caves: Budapest: Venture into Budapest's creepy caves with Eric Geller as he gains access to a secret WWII hospital and discovers a subterranean world below the metropolis.
City of Caves: Budapest: Venture into Budapest's creepy caves with Eric Geller as he gains access to a secret WWII hospital and discovers a subterranean world below the metropolis.
Secret Pagan Underground: Cappadocia: The castles and dungeons of the Hittites are hidden beneath the sandy lunar landscape of Cappadocia. Why did this ancient empire fall?
Secret Pagan Underground: Cappadocia: The castles and dungeons of the Hittites are hidden beneath the sandy lunar landscape of Cappadocia. Why did this ancient empire fall?