We use cookies to improve your website experience. By browsing this site, you’re accepting our privacy policy OK
Scientists research fascinating underworlds of secret tunnel networks, ancient structures, and bizarre geological occurrences that offer glimpses into our history.
Rob Nelson investigates the mysterious rocks at the bottom of Lake Michigan known as Underwater Stonehenge. Plus, the search for escape tunnels in Alcatraz.
A legendary train filled with stolen Nazi gold is said to be hidden in Poland. Rob and Stefan explore deep under the earth's surface to uncover the truth.
Priceless gold and silver artefacts are believed to be lost in King Solomon's hidden mines. Rob and Stefan search for the legendary treasure.
Rob Nelson investigates mysterious tunnels under Denver's airport. Plus, in Ohio he tries to uncover the secrets of a giant serpent-shaped mound.
Beneath the densely populated city of Naples lies a looming threat. A super volcano may be on the verge of erupting and cause an apocalyptic catastrophe.
New theories claim the sunken city of Atlantis may have been in the Americas. From the Bahamas to an ancient site in Louisiana, Rob and Stefan seek the evidence.
A strange cave freezes in summer and melts in winter, and a huge sand dune swallows a small child in an instant. Rob and Stefan explore these mysteries.
When an infamous pirate city sunk into the sea, a huge treasure may have gone with it. Could cutting edge technology reveal its resting place?
In California Rob and Stefan explore a cave, rumoured to house 100 pounds of gold stashed away during the Gold Rush. Can their tech end the mystery?
Rob Nelson hunts for a mass grave that could expose a dark secret. Plus, a giant lake is mysteriously disappearing and Rob set off to find out why.
Rob examines bizarre markings that suggest a violent clash between prehistoric beasts. In California, he explores if a strange lake is a home to alien life.
Rob Nelson investigates a cluster of ancient ruins in New England that suggest Europeans arrived in the Americas almost 1,000 years before Columbus.
Rob Nelson heads to Lake Michigan to investigate an unexplained, Bermuda Triangle-like phenomenon that has caused ships to disappear for centuries.
A legendary train filled with stolen Nazi gold is said to be hidden in Poland. Rob and Stefan explore deep under the earth’s surface to uncover the truth.
New theories claim the sunken city of Atlantis may have been in the Americas. From the Bahamas to an ancient site in Louisiana, Rob and Stefan seek evidence.
When an infamous pirate city sunk into the sea, a huge treasure may have gone with it. Could cutting-edge technology reveal its resting place?
In California Rob and Stefan explore a cave, rumored to house 100 pounds of gold stashed away during the Gold Rush. Can their tech end the mystery?