It's an image famous -- and controversial -- all the world round: in the Black Hills of South Dakota, the US government wrought four gigantic sculptures of past US Presidents on the face of the Six Grandfathers. In tonight's episode, Ben, Matt and Dylan explore the truth behind one of America's weirdest conspiracies: Is Mount Rushmore just a big carving? Or is there a secret, hidden for centuries, there within the stone?

It's an image famous -- and controversial -- all the world round: in the Black Hills of South Dakota, the US government wrought four gigantic sculptures of past US Presidents on the face of the Six Grandfathers. In tonight's episode, Ben, Matt and Dylan explore the truth behind one of America's weirdest conspiracies: Is Mount Rushmore just a big carving? Or is there a secret, hidden for centuries, there within the stone?

From UFOs to psychic powers and government cover-ups, history is riddled with unexplained events. You can turn back now or learn the Stuff They Don't Want You To Know ... an audio podcast from iHeartRadio.

From UFOs to psychic powers and government cover-ups, history is riddled with unexplained events. You can turn back now or learn the Stuff They Don't Want You To Know ... an audio podcast from iHeartRadio.

Stuff They Don't Want You To Know

From UFOs to psychic powers and government conspiracies, history is riddled with unexplained events. You can turn back now or learn the Stuff They Don't Want You To Know ... an audio podcast from iHeartRadio.

From UFOs to psychic powers and government conspiracies, history is riddled with unexplained events. You can turn back now or learn the Stuff They Don't Want You To Know ... an audio podcast from iHeartRadio.

Is there a secret room inside Mount Rushmore?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/9d643794-350f-4a84-aa64-b36b00f4ea75/transcript