Rob Nelson investigates rumors of a secret underground escape route used by the infamous gangster Al...

Rob Nelson explores mysterious tunnels beneath Denver's airport and capitol building to investigate...

Rob Nelson hunts for a legendary mass grave that could expose a dark secret of America's industrial...

Rob Nelson examines a set of bizarre markings that suggest a violent clash between prehistoric beast...

Rob descends into a cave 30 feet beneath Texas in search of evidence of a mass extinction event. The...

Rob Nelson heads to California to investigate a network for major fault lines that could set off an...

Rob investigates ancient ruins in New England that suggest Europeans arrived in the Americas almost...

Rob Nelson investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Unde...

A legendary train filled with stolen Nazi gold is said to be hidden in Poland. Using cutting-edge te...

Priceless gold and silver artifacts are believed to be in fabled lost Temple Treasures of Jerusalem...

Nikola Tesla died before finishing a mysterious, earth-shattering invention, but the ground beneath...

A massive supervolcano beneath Naples, Italy may be on the verge of erupting again, which could have...

New theories claim that the legendary sunken city of Atlantis could have actually been in the Americ...

A strange cave freezes in the summer and melts in the winter, and a massive sand dune swallows a sma...

When an infamous pirate city sunk into the sea after a massive earthquake, a pirate's treasure might...

Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northe...