Underground Worlds (2019)

Season 2

British documentary series exploring incredible feats of human endeavour underground, revealing what people have built, where they have built it, how and why.

Released Sept. 25, 2019 Episode 45 min None+

Genres: Documentary

Watch Providers: Amazon Prime Video, Science Channel, Spectrum On Demand, Discovery +, Discovery+ Amazon Channel + 4 more, Amazon Prime Video Free with Ads, Amazon Prime Video with Ads, Philo, Science Amazon Channel

Network: Yesterday

Country: United Kingdom
Languages: English

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S2E1 - Murder Raid Tunnels

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.

Jan. 10, 2022, midnight

S2E2 - Grand Canyon's Lost Treasure

Exploring inside the Grand Canyon Caverns - North America's largest dry cave system. Plus, Cold War radar bunkers around the UK.

Jan. 17, 2022, midnight

S2E3 - Cincinnati's Secret Caverns

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.

Jan. 24, 2022, midnight

S2E4 - Hotel Bunker of the Apocalypse

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.

Jan. 31, 2022, midnight

S2E5 - Mystery of the Kentucky Cave

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.

Feb. 7, 2022, midnight

S2E6 - Ireland's Underground Alcatraz

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.

Feb. 14, 2022, midnight

S2E7 - Medieval Maze of Secrets

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.

Feb. 21, 2022, midnight

S2E8 - Buried Lab of the Black Hills

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

Feb. 28, 2022, midnight

S2E9 - Subterranean Silo Survival

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.

March 7, 2022, midnight

S2E10 - Italy's Subterranean Secret

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

March 14, 2022, midnight

Network: Yesterday

Episode Runtime: 45 min.

Season Runtime: 45 min.

Released: Sept. 25, 2019

Last Air Date: March 14, 2022, midnight

Status: Returning Series

Certification: NR

REFRESH DATA

Updated: 1 month, 1 week ago

Next update: 2 weeks, 3 days from now