Underground Marvels

Underground Marvels

Continuing First aired 17/Oct/2019 United Kingdom English 2 season(s) 20 episode(s)
Documentary
Historians, engineers, ​and experts take a look at the underground structures, systems, and phenomena that exist beneath our feet.
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TimeScore 33% Skip It
Binge Meter 48% Slow Burn
Episode Pulse Quiet 40% activity score
Drop Rate 0% Very Low

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Seasons & Episodes

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Season 2 · Season 2
10 episode(s) · Air date: 05/Aug/2021
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S2E10
Medieval Maze of Secrets
Air date: 07/Oct/2021 · Time: 21:00 · Runtime: 45 min
Summary

A forgotten world of ancient underground passages and medieval engineering lies hidden beneath the town of Exeter, England; experts investigate and reveal how this ambitious tunnel system was the result of one of the deadliest epidemics in history.

Summary

A forgotten world of ancient underground passages and medieval engineering lies hidden beneath the town of Exeter, England; experts investigate and reveal how this ambitious tunnel system was the result of one of the deadliest epidemics in history.

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S2E8
Grand Canyon's Lost Treasure
Air date: 23/Sep/2021 · Time: 21:00 · Runtime: 45 min
Summary

Descending more than 200 feet beneath the Arizona bedrock lies the largest dry cave system in North America; experts explore this vast subterranean network to reveal the mysteries and undiscovered treasure that remain hidden within its walls.

Summary

Descending more than 200 feet beneath the Arizona bedrock lies the largest dry cave system in North America; experts explore this vast subterranean network to reveal the mysteries and undiscovered treasure that remain hidden within its walls.

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S2E7
Italy's Subterranean Secret
Air date: 16/Sep/2021 · Time: 21:00 · Runtime: 45 min
Summary

An unprecedented landslide unveils a hidden world beneath a picturesque town in northern Italy, and now experts investigate this vast network of tunnels and passageways that stretch 300 feet underground to reveal the city's subterranean past.

Summary

An unprecedented landslide unveils a hidden world beneath a picturesque town in northern Italy, and now experts investigate this vast network of tunnels and passageways that stretch 300 feet underground to reveal the city's subterranean past.

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S2E5
Ireland's Underground Alcatraz
Air date: 02/Sep/2021 · Time: 21:00 · Runtime: 45 min
Summary

Subterranean military fortresses situated on the southern coast of Ireland have protected against enemy invasion for over 400 years, and now, experts investigate how this powerful stronghold transformed into a brutal and terrifying prison.

Summary

Subterranean military fortresses situated on the southern coast of Ireland have protected against enemy invasion for over 400 years, and now, experts investigate how this powerful stronghold transformed into a brutal and terrifying prison.

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S2E4
Buried Lab of the Black Hills
Air date: 26/Aug/2021 · Time: 21:00 · Runtime: 45 min
Summary

Buried nearly a mile beneath the Black Hills of South Dakota is a cutting-edge laboratory at the forefront of astonishing scientific research; experts reveal advancements engineers achieved more than a century ago that keep it operating today.

Summary

Buried nearly a mile beneath the Black Hills of South Dakota is a cutting-edge laboratory at the forefront of astonishing scientific research; experts reveal advancements engineers achieved more than a century ago that keep it operating today.

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S2E3
Cincinnati's Secret Caverns
Air date: 19/Aug/2021 · Time: 21:00 · Runtime: 45 min
Summary

Deep beneath the streets of Cincinnati lies a network of deserted tunnels and caverns that contain a remarkable history of the city's origins, and now, experts investigate to reveal who built this underground labyrinth and why it was abandoned.

Summary

Deep beneath the streets of Cincinnati lies a network of deserted tunnels and caverns that contain a remarkable history of the city's origins, and now, experts investigate to reveal who built this underground labyrinth and why it was abandoned.

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S2E2
Mystery of the Kentucky Cave
Air date: 12/Aug/2021 · Time: 21:00 · Runtime: 45 min
Summary

The longest known cave system in the world spans hundreds of miles beneath the hills of Kentucky, and containing prehistoric artifacts and ancient human remains, experts reveal a subterranean mystery that may have changed the course of U.S. history.

Summary

The longest known cave system in the world spans hundreds of miles beneath the hills of Kentucky, and containing prehistoric artifacts and ancient human remains, experts reveal a subterranean mystery that may have changed the course of U.S. history.

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S2E1
Hotel Bunker of the Apocalypse
Air date: 05/Aug/2021 · Time: 21:00 · Runtime: 45 min
Summary

The top-secret construction of a massive nuclear bunker remained concealed under a palatial West Virginia hotel for decades, and now, experts reveal how this vast subterranean structure was one of the most closely guarded Cold War secrets in US history.

Summary

The top-secret construction of a massive nuclear bunker remained concealed under a palatial West Virginia hotel for decades, and now, experts reveal how this vast subterranean structure was one of the most closely guarded Cold War secrets in US history.

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Season 1 · Season 1
10 episode(s) · Air date: 17/Oct/2019
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S1E10
Curse of Cannibal Caves
Air date: 26/Dec/2019 · Time: 22:00 · Runtime: 45 min
Summary

A mysterious cave system is home to some of the oldest human remains ever discovered, and today, the explorers and researchers investigating this site are uncovering shocking evidence of cannibalism among its Ice Age denizens.

Summary

A mysterious cave system is home to some of the oldest human remains ever discovered, and today, the explorers and researchers investigating this site are uncovering shocking evidence of cannibalism among its Ice Age denizens.

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S1E9
Conspiracy in the Buried City
Air date: 19/Dec/2019 · Time: 22:00 · Runtime: 45 min
Summary

A buried ancient city hidden five stories underground, and to keep its location secret from invaders, its residents devised an ingenious trick; experts reveal what it was, and using the latest tech, they reveal the truth behind this strange place.

Summary

A buried ancient city hidden five stories underground, and to keep its location secret from invaders, its residents devised an ingenious trick; experts reveal what it was, and using the latest tech, they reveal the truth behind this strange place.

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S1E8
Ghosts of the Hell Maze
Air date: 12/Dec/2019 · Time: 22:00 · Runtime: 45 min
Summary

A labyrinth of tunnels in the French countryside has served as a secret hideout during wartime for centuries. On its walls, experts have discovered the final confessions of soldiers who fought here during one of the deadliest days of World War I.

Summary

A labyrinth of tunnels in the French countryside has served as a secret hideout during wartime for centuries. On its walls, experts have discovered the final confessions of soldiers who fought here during one of the deadliest days of World War I.

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S1E7
Treasures of the Lost Mine
Air date: 05/Dec/2019 · Time: 22:00 · Runtime: 45 min
Summary

Caverns hidden deep inside a remote mountain are home to a precious mineral found nowhere else on earth, and experts and treasure hunters use cutting-edge tech to follow rumors of a mysterious long-lost mine in search of a payday.

Summary

Caverns hidden deep inside a remote mountain are home to a precious mineral found nowhere else on earth, and experts and treasure hunters use cutting-edge tech to follow rumors of a mysterious long-lost mine in search of a payday.

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S1E6
World's Biggest Labyrinth
Air date: 21/Nov/2019 · Time: 22:00 · Runtime: 45 min
Summary

The world's biggest labyrinth is a 1,553-mile cave system that's home to some of history's darkest mysteries, and new discoveries at this strange place reveal the long-lost secrets of Nazi occupation, Soviet revolution, and Cold War subterfuge.

Summary

The world's biggest labyrinth is a 1,553-mile cave system that's home to some of history's darkest mysteries, and new discoveries at this strange place reveal the long-lost secrets of Nazi occupation, Soviet revolution, and Cold War subterfuge.

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S1E5
Cave of the Body Snatchers
Air date: 14/Nov/2019 · Time: 22:00 · Runtime: 45 min
Summary

An eerie system of underground vaults in Scotland was once the hideout for thieves who stole newly-buried bodies and sold them; today, experts are excavating these rubble-filled caves to reveal the secrets of what these bandits left behind.

Summary

An eerie system of underground vaults in Scotland was once the hideout for thieves who stole newly-buried bodies and sold them; today, experts are excavating these rubble-filled caves to reveal the secrets of what these bandits left behind.

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S1E4
The Renegade's Lair
Air date: 07/Nov/2019 · Time: 22:00 · Runtime: 45 min
Summary

A strange underground system known as the Black Cave was home to an infamous nobleman on the run from the law; today, experts investigate the secrets he left here to discover new parts of this mysterious network.

Summary

A strange underground system known as the Black Cave was home to an infamous nobleman on the run from the law; today, experts investigate the secrets he left here to discover new parts of this mysterious network.

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S1E3
Secrets of the Terror Tunnels
Air date: 31/Oct/2019 · Time: 22:00 · Runtime: 45 min
Summary

A vast system of tunnels built almost three thousand years ago was the site of the greatest battles of antiquity, and these disorienting passages could be the deadliest weapon in war; experts reveal what made this underground world so terrifying.

Summary

A vast system of tunnels built almost three thousand years ago was the site of the greatest battles of antiquity, and these disorienting passages could be the deadliest weapon in war; experts reveal what made this underground world so terrifying.

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S1E2
Mystery of the Lost Labyrinth
Air date: 24/Oct/2019 · Time: 22:00 · Runtime: 45 min
Summary

A strange, centuries-old labyrinth built into an abandoned quarry was built by an eccentric millionaire, and no one knows why; but now, a new excavation into this mysterious 9,000-foot tunnel system might finally reveal its dark secrets.

Summary

A strange, centuries-old labyrinth built into an abandoned quarry was built by an eccentric millionaire, and no one knows why; but now, a new excavation into this mysterious 9,000-foot tunnel system might finally reveal its dark secrets.

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S1E1
Secrets of the Rock
Air date: 17/Oct/2019 · Time: 22:00 · Runtime: 45 min
Summary

A hidden, subterranean city built within the Rock of Gibraltar was an immense fortress to control the seas during World War II, and new discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage.

Summary

A hidden, subterranean city built within the Rock of Gibraltar was an immense fortress to control the seas during World War II, and new discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage.

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Cast

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Chris Jarman
Chris Jarman
Self - Narrator (voice)

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