An den Ufern des Mississippi
The interior of the Mark Twain cave.
Bild: © Discovery Communications
In den Ozark Mountains
Participant Brandon Lee stands in front of a river
Bild: © Discovery Channel / Discovery Communications
Im Tal des Todes
Participant Michael Covert approaches mine entrance.
Bild: © Discovery Communications
In den Ozark Mountains
A portrait of Frank Colacino.
Bild: © Discovery Communications
In den Ozark Mountains
Jack Stallings is in the woods.
Bild: © Discovery Communications
Am Eisernen Berg
A portrait of Russell Blair.
Bild: © Discovery Communications
Im Tal des Todes
Participant Stephanie Petri approaches the mine entrance.
Bild: © Discovery Communications
In den Appalachen
Participants William Sherman, Cassandra Bambi Tran, and Jesse Randolph Phillips smile at the Darwin Mine entrance.
Bild: © Discovery Channel / Discovery Communications
Am Eisernen Berg
Participant Natalie Rottarr rests after leaving the cave.
Bild: © Discovery Channel / Discovery Communications
Im Tal des Shenandoah
Participant Joseph Fisher grits his teeth for the camera after exiting the limestone mine.
Bild: © Discovery Communications
An den Ufern des Mississippi
Sarah Williams smiles.
Bild: © Discovery Communications
Am Eisernen Berg
A portrait of Natalie Rottarr.
Bild: © Discovery Channel / Discovery Communications
In den Ozark Mountains
Participant Brandon Lee stands lângă râu
Bild: © Discovery Channel / Photobank 35383_ep103_003.JPG / Discovery Communications
In den Ozark Mountains
Participant Brandon Lee lângă râu
Bild: © Discovery Channel / Photobank 35383_ep103_003.JPG / Discovery Communications
An den Ufern des Mississippi
Tracy Heinke, who goes by Tray, stands in front of the cave entrance.
Bild: © Discovery Communications
In den Ozark Mountains
Jeff Tucker holds his helmet.
Bild: © Discovery Communications
In den Appalachen
Bild: © Discovery Channel / Discovery Communications
Im Tal des Shenandoah
Participants Herman Adkins & Joseph Fisher (who goes by Grizzly) devise a plan inside the mine after stumbling upon a body of water that is blocking their exit.
Bild: © Discovery Communications
In den Appalachen
The railway tracks inside the Darwin Mine.
Bild: © Discovery Communications
Im Tal des Shenandoah
Participants Herman Adkins & Joseph Fisher (who goes by Grizzly) shake hands after finding an exit from the cold water that leads to the limestone mine exit.
Bild: © Discovery Communications
An den Ufern des Mississippi
Participant Sarah Williams searches for a route while inside of the Mark Twain Cave.
Bild: © Discovery Communications
In den Appalachen
Darwin Mine shows a “fork in the road” inside of the mine with old pipes and debris present.
Bild: © Discovery Communications
In den Appalachen
Participant Cassandra Bambi Tran is inside the Darwin Mine.
Bild: © Discovery Communications
Im Tal des Shenandoah
Participants Herman Adkins & Joseph Fisher (who goes by Grizzly) float on their back in the cold water as they search for the limestone mine exit.
Bild: © Discovery Communications
Im Tal des Todes
Explorator într-o peşteră din Wales-ul de Sud
Bild: © Nathan L Roker / Getty Images / Moment Open/ Getty GettyImages-5 / nathanroker2015
Im Tal des Shenandoah
Explorator într-o peşteră din Wales de Sud
Bild: © Nathan L Roker / Getty Images / Moment Open/ Getty GettyImages-5 / nathanroker2015
In den Ozark Mountains
Jeff Tucker wears his helmet.
Bild: © Discovery Channel / Discovery Communications
In den Appalachen
Participant William Sherman holds his helmet with a walking stick outside of the Darwin Mine.
Bild: © Discovery Channel / Discovery Communications
In den Appalachen
Participant Cassandra Bambi Tran looks to the left, holding her helmet outside of the Darwin Mine.
Bild: © Discovery Channel / Discovery Communications
Im Tal des Todes
Participant Michael Covert stands alone before entering the Darwin Mine.
Bild: © Discovery Channel / Discovery Communications
In den Appalachen
Bild: © Discovery Channel / Discovery Communications
In den Appalachen
Bild: © Discovery Channel / Discovery Communications
An den Ufern des MississippiThe interior of the Mark Twain cave.Bild: © Discovery Communications
