Scary Interesting

Before the maps were drawn and the summits were crowded, a team of legendary explorers set out to do the impossible: conquer Mount Everest. Who would survive the descent? Special Thanks for Photographs Ernest H. Wilson, Vinko Rajic.

In 1973, eight world-class divers entered a "bottomless" Australian sinkhole known as The Shaft. What began as a record breaking attempt turned into a claustrophobic nightmare. Image(s) and/or video used under license from Shutterstock.

What happens when a visionary engineer ignores the warnings of experts to fly a balloon over the top of the world? Discover the chilling evidence buried in the Arctic snow. Special Thanks for Photographs: Jerzy Strzelecki, Oliver Beige.

133 days. That's how long Poon Lim drifted alone in the unforgiving Atlantic Ocean. After his transport ship was destroyed in WWII, he was left with nothing but a tiny raft and a few survival supplies. Special Thanks to: Leo-setä, Project Liberty ship, Walter Frost - City of Vancouver Archives, Map sources: Data SIO, NOAA, U.S. Navy, NGA, GEBCO, Landsat / Copernicus, IBCAO, TerraMetrics.

Known as the "Diver's Cemetery," Egypt's Blue Hole is the deadliest dive site on Earth. With over 130 fatalities, its mesmerizing depths hide a dark secret. Special Thanks for Photographs: Mohamed Kamal, Dmitry Kuznetsov, James st. John, The TerraMar Project.

Three impossible cases of people vanishing off the face of the Earth. People missing and the chilling discoveries and evidence revealed. Images and video used under license from Shutterstock.

On the surface, Texas's Jacob's Well looks like a harmless swimming hole. But beneath the crystal clear water lies a massive, treacherous underwater cavern. Images and video used under license from Shutterstock.

Mount Denali is North America's highest peak, but in 1967, it became the site of the worst mountaineering disaster in US history. Terrifying true story of the men who vanished into the whiteout. Special Thanks for Photographs Vinko Rajic, Maria Ly, atanudawn, Sergey Pashko, Hiroki Ogawa, Mountaindiver, Haluk Comertel, Jeremy Zero, Petr Meissner, Russell Toris, U. S. Army Alaska, Ross Fowler.

Experience three historic mysteries where the truth was lost to time. Delve into the haunting legend of the Alleghenies, the eerie vanishing of newlyweds in the Grand Canyon, and the infamous Sodder family fire. Special Thanks for Photographs: Grand Canyon National Park Service, Nicolas Vollmer, NPS Natural Resources, Alex Proimos, CT Cooper, O Palsson.

A broken lifeline leaves a cave diver stranded in an underwater labyrinth. A fight for survival ensues. Special Thanks to: Touring Club Italiano, Reginestein, P.Southwood, G.Bembridge, m01229, J.Williams, S.Baron, S.Mouser, R.Somma, M.Whatmough, K.Ram, C.Pennington, S Pakhrin, Georgia National Guard, K.Pon, Blind Fish Prod, A.T.T.L.G., L.H.Godoi, UtahRiders, M.Pfleghar, F.Oak, M.Fagundes.