Cities of the Underworld S4E2
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Cities of the Underworld
S04E02 — America's Military Underground
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Cities of the Underworld

S04E02 America's Military Underground

2021-09-14

Don embarks on a journey through covert military and governmental underground passages, uncovering classified innovations that have the potential to construct entire urban environments beneath the surface.

Season 4 Episodes

1
Mayan Apocalypse
2021-09-07
 2
America's Military Underground
2021-09-14
 3
America's Unmapped Murder Tunnels
2021-09-21
 4
America's Ancient Ancestors
2021-09-28
 5
The Pirate Queen's Lair
2021-10-05
 6
Templars and The Founding Fathers
2021-10-12
 7
Secrets of the Ancient Metropolis
2021-10-19
 8
The Lost Aztec Colony
2021-10-26