Explorers: Adventures of the Century

A group of climbers attempt to descend into an active volcano to get as close as possible to the spitting lava lake. They brave poisonous gasses and searing heat climbing into the earth.

Mitu Monteiro, a former world champion kite surfer, attempts to ride to the 12 volcanic islands of his homeland completely solo. It's a challenge he hopes will help unite the people of Cape Verde.

Charlie Head attempts to stand up paddle board the Rio Marañón, the Amazon River's main source, a feat that's never been done. This might be his only chance.

Ben Stookesberry and a group of kayakers journey to the remote jungles of Papua New Guinea to attempt a first descent of the Beriman River.

After seeing the magnificent Andean condor ride thermal winds from the sea to the peaks of the Andes, paragliders Hernán Pitocco and Horacio Llorens try to follow the birds on their 3,000km ascent.

Pedra Branca, the southernmost land of Australia, has waves that make surfers shudder. Alastair McLeod wants to be the first windsurfer to drop in on this monster slab.

Onekotan is a Pacific island with a collapsed volcano that Matthias Haunholder wants to ski down, but he has to contend with some extremely unpredictable conditions.

The Citadel is a 3,000m peak in the Alaska Range that alpinists Matt Helliker and Jon Bracey are determined to be the first to conquer. But they must be prepared to face the unknown in their quest.

Cerro Torre changed David Lama's life from the moment he tried to climb it. After summiting the peak with assistance, David wants to be the first person to ever free climb the infamous mountain.

An attempt to break the world record for the highest freefall will take Felix Baumgartner 36,500m above the earth and to his absolute limit.