Season
- Season 4 2021-09-07
- Season 3 2008-10-26
- Season 2 2008-01-28
- Season 1 2007-03-02
- Season 0 2006-03-02
Episode
- Episode 1: Mayan Apocalypse
- Episode 2: America's Military Underground
- Episode 3: America's Unmapped Murder Tunnels
- Episode 4: America's Ancient Ancestors
- Episode 5: The Pirate Queen's Lair
- Episode 6: Templars and The Founding Fathers
- Episode 7: Secrets of the Ancient Metropolis
- Episode 8: The Lost Aztec Colony
Cities of the Underworld Season 4 America's Unmapped Murder Tunnels
8.2/10 users Don Wildman travels to the farthest and deepest reaches of the globe, using cutting-edge technology to explore mysteries buried deep underground.
