Watch Underground Worlds(2019) Online Free, Underground Worlds All Seasons

Seasons & Episodes

EP1 Murder Raid Tunnels Jan 10, 2022

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.

EP2 Grand Canyon's Lost Treasure Jan 17, 2022

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

EP3 Cincinnati's Secret Caverns Jan 24, 2022

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.

EP4 Hotel Bunker of the Apocalypse Jan 31, 2022

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.

EP5 Mystery of the Kentucky Cave Feb 07, 2022

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.

EP6 Ireland's Underground Alcatraz Feb 14, 2022

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.

EP7 Medieval Maze of Secrets Feb 21, 2022

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.

EP8 Buried Lab of the Black Hills Feb 28, 2022

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

EP9 Subterranean Silo Survival Mar 07, 2022

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.

EP10 Italy's Subterranean Secret Mar 14, 2022

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

8| en| Documentary

Synopsis

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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