Expeditions to the Edge

Scientists are on a dangerous expedition into the heart of an active volcano.

An extreme marathon runner, cut off by sandstorms, is stranded in the Sahara.

Four American climbers scale Kyrgyzstan's granite walls. Now, they're hostages in a terrorist battle.

In the Himalayas, four kayakers try to conquer the world's most dangerous river.

Follow a team of mountain climbers as they attempt a challenging ascent up the treacherous slopes of Mt. Hood.

Crime investigators scale Mount Everest to solve a mystery on the slopes.

A team explores a vast underground cave system.

A team explores a sunken submarine.

A family of adventurers embark on a kayaking expedition along a remote and rugged coast.

A team rescues a diver who is trapped in a sunken ship.

Mushers embark on the grueling Iditarod Trail Sled Dog Race across the Alaskan wilderness.

A team goes on a dangerous mission to an isolated and abandoned space station.