What on Earth?

Season 6 Episode 5: The Cave to Hell

When a sinister cave is discovered in a remote corner of Iceland, experts uncover a secret underworld tunneling to unknown depths, and using cutting-edge tech, they investigate if this strange place could hold secrets of alien worlds.

Genre:

Documentary

Seasons:

12

Episodes:

131

Actor:

Steven Kearney, Andrew Gough

Quality:

HD

Status:

Returning Series

First Air:

2015

IMDb:

6.4