Scientists research fascinating underworlds of secret tunnel networks, ancient structures, and bizarre geological occurrences that offer glimpses into our history.
S1 E1: American Stonehenge
S1 E2: Mystery Of The Serpent Mound
S1 E4: America's Buried Massacre
S1 E5: Rocky Mountain Monsters
S1 E6: California's Hidden Doomsday
S1 E7: Secret History Of The New World
S1 E8: Great Lakes Bermuda Triangle
Rob Nelson heads to Lake Michigan to investigate an unexplained, Bermuda Triangle-like phenomenon that has caused ships to disappear for centuries.
S2 E1: Legend Of The Nazi Gold
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.
S2 E2: King Solomon's Treasures
Priceless gold and silver artefacts are believed to be lost in King Solomon's hidden mines. Rob and Stefan search for the legendary treasure.
S2 E4: Doomsday Volcano Mystery
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.
S2 E5: Atlantis In America
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.
S2 E6: Mystery Of The Ice Cave
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.
S2 E7: Lost Pirate City Of Treasure
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?
S2 E8: Quest For The Gold Rush Fortune
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?
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