Watch Trailer
DISCLAIMER: Not all titles shown are currently available on all streaming providers.

Watch Underground Marvels Season 1 Episode 1 Online

  • COUNTRIES: United States of America
  • Subtitles: English

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.