Underground Marvels — Season 1, Episode 4: The Renegade's Lair
Documentary • 45 min • 2 seasons, 20 episodes • ★ 6.5/10
Episode synopsis
A strange underground system known as the Black Cave was home to an infamous nobleman on the run from the law; today, experts investigate the secrets he left here to discover new parts of this mysterious network.
About Underground Marvels
Historians, engineers, and experts take a look at the underground structures, systems, and phenomena that exist beneath our feet.