11 Season
120 Episode
Mysteries of the Abandoned - Season 9 Episode 14 Hidden Tunnels of Gibraltar
A forgotten military fortification lies hidden in the Rock of Gibraltar.
- Year: 2024
- Country: United States of America
- Genre: Documentary
- Studio: Science
- Keyword: architecture, abandoned, abandoned mine, architecture history, abandoned building
- Director: Philip Grossman
- Cast: Kasper Michaels