Secrets of the Terror Tunnels Underground Marvels : Season 1 Episode 3
Yesterday 1h 00m int(0)
Aired: October 9th, 2019 @ 10:00 PM EST on Yesterday
A vast system of tunnels built almost three thousand years ago was the site of the greatest battles of antiquity, and these disorienting passages could be the deadliest weapon in war; experts reveal what made this underground world so terrifying.