Cities of the Underworld: 4x4
America's Ancient Ancestors
Don goes deep beneath the great lakes and explores flooded caves as he searches for evidence of a mysterious, cave-dwelling society that may have been the first people to reach America.
4 - 1Mayan Apocalypse Sep. 07, 2021- 4 - 2America's Military Underground Sep. 14, 2021
- 4 - 3America's Unmapped Murder Tunnels Sep. 21, 2021
- 4 - 4America's Ancient Ancestors Sep. 28, 2021
- 4 - 5The Pirate Queen's Lair Oct. 05, 2021
- 4 - 6Templars and The Founding Fathers Oct. 12, 2021
- 4 - 7Secrets of the Ancient Metropolis Oct. 19, 2021
