Underground Worlds

Underground Worlds

Continuing First aired 25/Sep/2019 United Kingdom English 2 season(s) 20 episode(s)
Documentary
British documentary series exploring incredible feats of human endeavour underground, revealing what people have built, where they have built it, how and why.
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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: 10/Jan/2022
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Season Overview

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S2E10
Italy's Subterranean Secret
Air date: 14/Mar/2022 · Runtime: 45 min
Summary

Exploring caves beneath Orvieto in Italy, originally built by the Etruscans long before the Roman Empire. Plus, a former limestone mine under Kansas City.

Summary

Exploring caves beneath Orvieto in Italy, originally built by the Etruscans long before the Roman Empire. Plus, a former limestone mine under Kansas City.

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S2E9
Subterranean Silo Survival
Air date: 07/Mar/2022 · Runtime: 45 min
Summary

Exploring old tunnels in an abandoned tin mine beneath the moors of Cornwall. Plus, former Atlas missile siloes in Kansas and tunnels hiding under Valetta.

Summary

Exploring old tunnels in an abandoned tin mine beneath the moors of Cornwall. Plus, former Atlas missile siloes in Kansas and tunnels hiding under Valetta.

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S2E8
Buried Lab of the Black Hills
Air date: 28/Feb/2022 · Runtime: 45 min
Summary

Exploring a former gold mine turned scientific laboratory in South Dakota. Plus, limestone tunnels in London and a former water cistern in Denmark.

Summary

Exploring a former gold mine turned scientific laboratory in South Dakota. Plus, limestone tunnels in London and a former water cistern in Denmark.

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S2E7
Medieval Maze of Secrets
Air date: 21/Feb/2022 · Runtime: 45 min
Summary

Exploring long narrow tunnels beneath Exeter that were built in medieval times to protect the city. Plus, a marble quarry under the pine forests of Vermont.

Summary

Exploring long narrow tunnels beneath Exeter that were built in medieval times to protect the city. Plus, a marble quarry under the pine forests of Vermont.

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S2E6
Ireland's Underground Alcatraz
Air date: 14/Feb/2022 · Runtime: 45 min
Summary

Exploring hidden defences that have kept Cork Harbour, in Ireland, safe for over 400 years. Plus, a former submarine base in the fjords of northern Norway.

Summary

Exploring hidden defences that have kept Cork Harbour, in Ireland, safe for over 400 years. Plus, a former submarine base in the fjords of northern Norway.

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S2E5
Mystery of the Kentucky Cave
Air date: 07/Feb/2022 · Runtime: 45 min
Summary

Exploring the vast 400-mile Mammoth Cave in Kentucky, USA. Plus, a newly constructed opening into a metal mine in Wales - untouched for over 70 years.

Summary

Exploring the vast 400-mile Mammoth Cave in Kentucky, USA. Plus, a newly constructed opening into a metal mine in Wales - untouched for over 70 years.

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S2E4
Hotel Bunker of the Apocalypse
Air date: 31/Jan/2022 · Runtime: 45 min
Summary

Exploring the secret, Cold War US government bunker hidden under Greenbrier Hotel, West Virginia; Plus, delve into the depths of a former slate mine in Wales, UK.

Summary

Exploring the secret, Cold War US government bunker hidden under Greenbrier Hotel, West Virginia; Plus, delve into the depths of a former slate mine in Wales, UK.

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S2E3
Cincinnati's Secret Caverns
Air date: 24/Jan/2022 · Runtime: 45 min
Summary

Exploring the forgotten underworld hiding beneath the streets of Cincinati, USA. Plus, a state-of-the-art Cold War fortress on the shores of Denmark.

Summary

Exploring the forgotten underworld hiding beneath the streets of Cincinati, USA. Plus, a state-of-the-art Cold War fortress on the shores of Denmark.

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S2E1
Murder Raid Tunnels
Air date: 10/Jan/2022 · Runtime: 45 min
Summary

Exploring the extensive air raid tunnels hidden beneath Ramsgate. Also, how the former thriving mining town of Butte, Montana repurposed the 10,000 miles of tunnels.

Summary

Exploring the extensive air raid tunnels hidden beneath Ramsgate. Also, how the former thriving mining town of Butte, Montana repurposed the 10,000 miles of tunnels.

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Season 1 · Season 1
10 episode(s) · Air date: 25/Sep/2019
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Season Overview

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S1E10
Dover War Rooms
Air date: 27/Nov/2019 · Runtime: 45 min
Summary

This edition explores the military headquarters built beneath Dover Castle during the Second World War, and Odessa's catacombs, possibly the largest tunnel network in the world.

Summary

This edition explores the military headquarters built beneath Dover Castle during the Second World War, and Odessa's catacombs, possibly the largest tunnel network in the world.

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S1E9
Edinburgh Vaults
Air date: 20/Nov/2019 · Runtime: 45 min
Summary

The sinister history of Edinburgh's vaults and the development of Helsinki's subterranean spaces. Plus, the impact of the building of Naples on the volcanic ground below.

Summary

The sinister history of Edinburgh's vaults and the development of Helsinki's subterranean spaces. Plus, the impact of the building of Naples on the volcanic ground below.

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S1E8
The Maginot Line
Air date: 13/Nov/2019 · Runtime: 45 min
Summary

The secrets of the largest subterranean fortress along France's border with Germany, and a look at how a unique precious mineral was discovered in Derbyshire.

Summary

The secrets of the largest subterranean fortress along France's border with Germany, and a look at how a unique precious mineral was discovered in Derbyshire.

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S1E7
Jersey War Tunnels
Air date: 06/Nov/2019 · Runtime: 45 min
Summary

The underground bases built by the German army during the occupation of Jersey, and a group of more than 20 underground cities in Turkey, one of which dates back to 800BC.

Summary

The underground bases built by the German army during the occupation of Jersey, and a group of more than 20 underground cities in Turkey, one of which dates back to 800BC.

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S1E6
City of Naours
Air date: 30/Oct/2019 · Runtime: 45 min
Summary

An underground city beneath a forest in Northern France built to house 3,000 people, an ice cave under Iceland's biggest glacier, and a subterranean power station in London.

Summary

An underground city beneath a forest in Northern France built to house 3,000 people, an ice cave under Iceland's biggest glacier, and a subterranean power station in London.

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S1E5
Bouzincourt
Air date: 23/Oct/2019 · Runtime: 45 min
Summary

A labyrinth of tunnels underneath a tiny French village which contains mysteries from several historical eras, and a Welsh slate mine that has been given a new lease of life.

Summary

A labyrinth of tunnels underneath a tiny French village which contains mysteries from several historical eras, and a Welsh slate mine that has been given a new lease of life.

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S1E4
Kingdom of Salt
Air date: 16/Oct/2019 · Runtime: 45 min
Summary

The Wieliczka Salt mine in Poland, some 327 meters deep, where the voids left behind from excavating salt have been transformed into extraordinary spaces, carved by hand.

Summary

The Wieliczka Salt mine in Poland, some 327 meters deep, where the voids left behind from excavating salt have been transformed into extraordinary spaces, carved by hand.

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S1E3
Switzerland
Air date: 09/Oct/2019 · Runtime: 45 min
Summary

A look at some of Switzerland's 300,000 subterranean bunkers, the creation of a local entrepreneur shrouded in mystery in England and a network of tunnels deep beneath Slovenia.

Summary

A look at some of Switzerland's 300,000 subterranean bunkers, the creation of a local entrepreneur shrouded in mystery in England and a network of tunnels deep beneath Slovenia.

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S1E2
Sweden
Air date: 02/Oct/2019 · Runtime: 45 min
Summary

Explores how Sweden has gone to extraordinary lengths to protect itself - by excavating 65,000 nuclear bunkers. Plus, Somerset's Cheddar Gorge and an underground first in Romania.

Summary

Explores how Sweden has gone to extraordinary lengths to protect itself - by excavating 65,000 nuclear bunkers. Plus, Somerset's Cheddar Gorge and an underground first in Romania.

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S1E1
Gibraltar
Air date: 25/Sep/2019 · Runtime: 45 min
Summary

This edition explores the hidden network of tunnels and caves beneath Gibraltar that were instrumental to the Allies success during WWII. Plus, the ultimate super-sewer beneath London and a breathtaking cave system in Postojna, Slovenia.

Summary

This edition explores the hidden network of tunnels and caves beneath Gibraltar that were instrumental to the Allies success during WWII. Plus, the ultimate super-sewer beneath London and a breathtaking cave system in Postojna, Slovenia.

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