Underground Marvels

Season 1 Episode 1: Secrets of the Rock

A hidden, subterranean city built within the Rock of Gibraltar was an immense fortress to control the seas during World War II, and new discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage.

Genre:

Documentary

Seasons:

2

Episodes:

20

Cast:

Chris Jarman

Quality:

HD

Duration:

45 min

First Air:

2019

Rating:

6.5