Skip to content
Home Shows This Day In History
Cable Provider Drop Down Menu
  • Visit
  • Sign Out
Your Profile
  • Profile
  • Sign Out
Stream HISTORY

The UnXplained

New Episodes Return Fri., Jun. 6 at 9/8c; Stream Next Day
  • about
  • Episodes
  • cast
  • photos
The Underground World
Start Streaming

The UnXplained

S 2 E 5

The Underground World

Aug 08, 2020 | 42m 3s | tv-pg | CC

Despite all of our modern technology and sophistication, there is much that we still don't know about what lies beneath our feet, deep underground. What is at the center of the Earth? Is there really a solid core of heavy metals, or could it be a hollow environment, as many researchers claim? And just how much of mankind's history took place underground? Recent discoveries of ancient underground structures such as the city of Derinkuyu and the Malta Hypogeum suggest that there may be more structures down there, waiting to be re-discovered. If much of our past was subterranean, could our future be as well?

Get Instant Access to Free Updates

Don’t Miss Out on HISTORY news, behind the scenes content, and more.

Please enter a valid email address
By submitting your information, you agree to receive emails from HISTORY and A+E Global Media. You can opt out at any time. You must be 16 years or older and a resident of the United States. More details:
  • Privacy Policy
  • Terms of Use
  • Contact Us

Need help with the site?

A+E Global Media
  • HISTORY Education
  • HISTORY Vault®
  • HISTORY Apps
  • HISTORY2™
  • HISTORY en Español®
  • Military HISTORY®
  • Newsletter Sign Up
  • Share Your Opinions
  • FAQ / Contact Us
© 2025, A&E Television Networks, LLC. All Rights Reserved.
  • AETV homepage
  • mylifetime homepage
  • lmn homepage
  • fyi homepage
  • viceland homepage
  • biography homepage
  • crime and investigation homepage
  • lrw schedule page
  • HISTORY Education
  • HISTORY Vault®
  • HISTORY Apps
  • HISTORY2™
  • HISTORY en Español®
  • Military HISTORY®
  • Newsletter Sign Up
  • Share Your Opinions
  • FAQ / Contact Us
  • Advertise with Us
  • Employment Opportunities
  • A+E Factual Studios™
  • Accessibility Support
  • A+E Studios®
  • TV Parental Guidelines
  • Terms of Use
  • Privacy Policy
  • Copyright Policy
  • Cookie Notice
  • Ad Choices

WELCOME: You are logged in with an Unknown Provider and can now watch all available content.

Get the latest email updates from HISTORY!

Invalid Email

Invalid Zip Code

Choose your favorite shows:
No thanks
By submitting your information you agree to receive email updates from HISTORY and A+E Global Media. You can opt out at any time. More details:
  • Privacy Policy
  • Terms of Use
  • Contact Us

There was an error!

Please try again later.

Thank you for subscribing!

You will soon receive emails about your favorite HISTORY shows.

Create a Profile to Add this show to your list!

        Get Started
Already have a profile? Sign In