Sign in
Underground Marvels
Season 2 Episode 9

Underground Marvels

Science Channel channel logoTV-PGDocumentary
Ireland's Underground AlcatrazSeason 2 Episode 9
Subterranean military fortresses situated on the southern coast of Ireland have protected against enemy invasion for over 400 years, and now, experts investigate how this powerful stronghold transformed into a brutal and terrifying prison.
Cast
Jamie Effros
Rating
TV-PG
Genres
Documentary
Back to Show

More Like This

  • Secrets of the Underground
  • Abandoned: Expedition Shipwreck
  • Unearthed
  • Secrets in the Ice
  • Secrets in the Jungle
  • What on Earth?
  • Secrets of the Viking Stone
  • Impossible Engineering
  • Engineering Catastrophes
  • Dino Hunters

Frequently Asked Questions

  • Yes! You can record an unlimited amount of live or upcoming content to your DVR and save them for up to 1 year.
    Save
  • HBO Max:
    • Sign up for Philo
    • Go to your Philo account page and follow the steps to activate your HBO Max Basic with Ads Plan account.

    discovery+:
    • Sign up for Philo
    • Go to your Philo account page and follow the steps to activate your discovery+ account.
  • Once your account is activated, you can sign in to HBO Max and discovery+ apps with your email and password to start watching.
    • An email address
    • A future payment method
    • A broadband internet connection
    • A supported device
    Philo devices
    Web, iPhone & iPad, Android phones & tablets, Roku, Fire TV, Samsung TV, VIZIO TV, LG TV, Apple TV, Android TV, and Chromecast via Android
  • With your Philo Core subscription, you’ll unlock a world of entertainment. You can enjoy over 70 top-rated live channels, thousands of titles on demand, and the AMC+ library of groundbreaking originals, blockbuster movies, and classic collections. Plus, access to HBO Max With Ads Plan and discovery+ for just $33/month when you sign up on Philo.com.