Secrets of the Underground

Watch Secrets of the Underground on Science Channel and 1 other channel

Record to watch 10 episodes in the next two weeks

    American Stonehenge
    Mystery of the Serpent Mound
    Capone's Escape Tunnels
    America's Buried Massacre
    Rocky Mountain Monsters
    California's Hidden Doomsday
    Secret History of the New World
    Doomsday Volcano Mystery
    Legend of the Nazi Gold
    Mystery of the Ice Cave
  • American Stonehenge

    Rob Nelson investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Underwater Stonehenge; at the notorious Alcatraz prison, Rob uses state-of-the-art technology in search of rumored escape tunnels.
    Upcoming
  • Mystery of the Serpent Mound

    Exploring mysterious tunnels beneath Denver's airport, capitol building and downtown to investigate rumors of a secret organization that operates below; in Ohio, trying to uncover the ancient secrets of a giant mound shaped like a serpent.
    Upcoming
  • Capone's Escape Tunnels

    Investigating rumors of a secret underground escape route used by the infamous gangster Al Capone; trying to uncover who or what built a vast landscape of earthen mounds in Washington state.
    Upcoming
  • America's Buried Massacre

    Hunting for a legendary mass grave that could expose a dark secret of America's industrial past; using cutting-edge technology to find out why a giant lake is mysteriously disappearing high in the mountains.
    Upcoming
  • Rocky Mountain Monsters

    Examining a set of bizarre markings that suggest a violent clash between prehistoric beasts; in California, Rob investigates to see if a strange lake is a home to alien life.
    Upcoming
  • California's Hidden Doomsday

    Heading to California to investigate a network for major fault lines that could set off an unprecedented mega-quake; he explores a mysterious sinkhole that some believe is an endless pit to the center of the Earth.
    Upcoming

Enjoy Science Channel and 70+ other channels

Watch and record live TV with a Philo subscription

One Subscription.
Endless Entertainment.
Unlock live TV, binge-worthy shows, hit movies, and more. Starting at $25/month.
View plans
Secrets of the Underground

More about Secrets of the Underground

A fascinating new world has emerged for scientists to study, and it's just beneath their feet. With the emergence of cutting-edge technologies such as ground penetrating radar, LIDAR (Light Detection and Ranging), and 3-D imaging, scientists are now able to research underworlds of secret tunnel networks, ancient structures, and bizarre geological occurrences that offer glimpses into the past. In "Secrets of the Underground," Rob Nelson, an ecologist by trade and an explorer by pastime, travels the country to investigate long-lost, subterranean phenomena. Nelson looks at all things hidden, covert and unfamiliar, from intricate and forgotten sewers and caves to lost civilizations and structures.

Starring

Rob Nelson, Tim Bechtel, Jared Peacock, Valerie Heest
  • Underground Marvels
  • Strangest Things
  • Strangest Things
  • Secrets in the Sand
  • Secrets in the Jungle
  • Mystery at Blind Frog Ranch
  • Expedition X
  • Monsters Underground
  • Finding Atlantis: The New Evidence
  • Unearthed
  • Love After Lockup
  • SpongeBob SquarePants
  • The First 48
  • Tyler Perry's House of Payne
  • The Golden Girls
  • Fatal Attraction
  • 90 Day Fiancé
  • For My Man
  • Martin
  • Everybody Loves Raymond

Frequently Asked Questions

  • Philo is a live TV streaming service that offers two plans to fit your entertainment needs:

    Essential ($25/month): 70+ live channels and over 75,000 movies and shows on-demand. New users get a 7-day free trial!

    Bundle+ ($33/month): Includes all the channels and entire streaming library available in the Essential plan, the entire AMC+ library, and access to HBO Max Basic with Ads plan and discovery+ included.

    Both plans: offer 1-year unlimited cloud DVR, let you stream on up to 3 devices at once, create up to 10 profiles, and cancel anytime with no contract.

    Free Channels: Not ready to subscribe? You can also enjoy Free Channels with no credit card required—simply create your account and start watching.
  • Yes! New users that sign up for the Essential plan can try it free for 7 days. You can explore our channels, features, and content before your subscription begins. No contract required—cancel anytime before your trial ends with no charges.

    • 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
  • Yes! You can record an unlimited amount of live or upcoming content to your cloud DVR and save them for up to a year. No equipment needed!
    Save
  • Nope! No hardware is required, ever. Philo's DVR is already built into the app, so there's nothing to plug in, set up, or pay extra for.

    With an Essential or Bundle+ subscription, you get unlimited DVR storage included, and your recordings are saved for a full year. If you're watching with the Free Channels, recordings are saved for 30 days.
  • Yes! You can enjoy tons of premium television and movies by upgrading your Philo subscription plan with add-ons.

    Here is a list of our available add-ons:

    • HBO Max Standard (ad-free): Watch HBO Originals and hit movies ad-free for $13 more per month. Live sports included (in HBO Max app).
    • Movies & More: Watch award-winning films, cult classics, celebrity stories, documentaries, and more - for $3 more per month.
    • AMC+ (ad-free): Enjoy ad-free access to the entire AMC+ library for $4 more per month.
    • MGM+ (ad-free): Stream thousands of the latest hits, fan favorites, original series, documentaries, and comedy specials for an additional $8/month.
    • ALLBLK (ad-free): Stream original series, independent films, nostalgic Black cinema, reality, and lively stage plays for $7 more per month.
    • Hallmark+ (ad-free): Watch exclusive originals, reality shows, rom-coms, cozy mysteries, heartfelt dramas, and beloved holiday movies for an additional $8/month.
    • STARZ (ad-free): Enjoy today’s hits, classic movies, and bold original series for an additional $12/month.
  • HBO Max:
    • Sign up for the Bundle+ ($33/month) plan.
    • Go to your Philo account page and follow the steps to activate your HBO Max Basic with Ads plan account.

    discovery+:
    • Sign up for the Bundle+ ($33/month) plan.
    • Go to your Philo account page and follow the steps to activate your discovery+ account.