Synopsis
Don Wildman travels to the farthest and deepest reaches of the globe, using cutting-edge technology to explore mysteries buried deep underground.
Series Information
- First Aired
- 2007
- Last Aired
- 2021
- Seasons
- 4
- Episodes
- 48
- Episode Length
- 43 min
- Genre
- Documentary
- Network
- History, Planète+ A&E
- Status
- Ended
- Rating
- 8.1 / 10 (14 votes)
Top Cast
Don Wildman
Host
Ready to watch Cities of the Underworld?
All seasons & episodes — free, HD, no signup.
▶ Watch Cities of the Underworld FreeYou May Also Like
Mysteries at the Museum
2010 ★ 8.8
How Do They Do It?
2006 ★ 7.5
Long Way Up
2020 ★ 7.5
MegaStructures
2004 ★ 7.5
The Reluctant Traveller with Eugene Levy
2023 ★ 7.4
Horizon
1964 ★ 7.5
Through the Wormhole
2010 ★ 7.7
Biography
1987 ★ 6.7
Earth at Night in Colour
2020 ★ 8.2
Welcome to Earth
2021 ★ 7.6
Disney Gallery / Star Wars: The Book of Boba Fett
2022 ★ 6.2
The World According to Jeff Goldblum
2019 ★ 6.6
Drain the Oceans
2018 ★ 7.1
Behind the Attraction
2021 ★ 7.3
More Documentary Series
MythBusters
2003 ★ 7.8
Ancient Aliens
2010 ★ 7.1
Formula 1: Drive to Survive
2019 ★ 8.2
Marvel Studios Legends
2021 ★ 7.4
Cosmos
2014 ★ 8.5
Prehistoric Planet
2022 ★ 8.3
Planet Earth
2006 ★ 8.6
Unsolved Mysteries
2020 ★ 7.7
The Last Dance
2020 ★ 8.3
The Blue Planet
2001 ★ 8.4
Planet Earth II
2016 ★ 8.6
Blue Planet II
2017 ★ 8.6
1000 Ways to Die
2009 ★ 7.7
Cosmos: A Personal Voyage
1980 ★ 8.7
More with Don Wildman
The UnBelievable with Dan Aykroyd
2023 ★ 6.5
Secrets Declassified with David Duchovny
2025 ★ 6.7
Mysteries at the Monument
2013 ★ 8.3
Life After People: The Series
2009 ★ 7.3
Hazardous History with Henry Winkler
2025 ★ 7.9
The Mega-Brands That Built America
2023 ★ 8.4
Mysteries Unearthed with Danny Trejo
2024 ★ 8.3
Holy Marvels with Dennis Quaid
2024 ★ 6.8
Off Limits
2011 ★ 7.5
Metropolis
2015 ★ 2.0
History's Greatest Picks with Mike Wolfe
2026 ★ 7.0
History's Deadliest with Ving Rhames
2026 ★ 5.8
How Disney Built America
2024 ★ 8.3
Weird Travels
2003 ★ 9.0
Trending Now
Silo
2023 ★ 8.2
Bleach
2004 ★ 8.4
The Grand Tour
2026 ★ 9.6
Lanterns
2026 ★ 8.3
The Gentlemen
2024 ★ 7.8
Reacher
2022 ★ 8.1
Furious
2026 ★ 7.2
Ted Lasso
2020 ★ 8.4
Dark Matter
2024 ★ 7.8
Chad Powers
2025 ★ 8.0
Re:ZERO -Starting Life in Another World-
2016 ★ 8.1
One Piece
1999 ★ 8.7
The Early Spring
2026 ★ 7.6
Lioness
2023 ★ 8.1
Popular This Week
Watch What Happens Live with Andy Cohen
2009 ★ 4.9
The Mentalist
2008 ★ 8.4
Coronation Street
1960 ★ 5.4
Home Alone
2013 ★ 7.5
The Simpsons
1989 ★ 8.0
The Tonight Show Starring Jimmy Fallon
2014 ★ 5.8
Law & Order: Special Victims Unit
1999 ★ 8.0
The Late Show with Stephen Colbert
2015 ★ 6.1
Criminal Minds
2005 ★ 8.3
El conquistador
2005 ★ 5.7
The Tonight Show Starring Johnny Carson
1962 ★ 7.5
Tagesschau
1952 ★ 6.8
The Rookie
2018 ★ 8.5
Game of Thrones
2011 ★ 8.5
Explore related titles
Frequently Asked Questions
Where can I watch Cities of the Underworld online for free?
You can watch every season and episode of Cities of the Underworld online for free in HD on FreeFlix. No signup required.
How many seasons of Cities of the Underworld are there?
Cities of the Underworld has 4 seasons and 48 episodes, all available on FreeFlix.
Is Cities of the Underworld available in HD?
Yes, all episodes of Cities of the Underworld stream in HD with multiple backup sources.
Do I need an account or subscription?
No. FreeFlix is 100% free with no registration, payment, or account required.