Naturwunder der Erde

Will Gadd kayaks, bikes and climbs in the Grand Canyon

Will Gadd kayaks, bikes and climbs in the Grand Canyon

Underwater shot of Will Gadd (left) and shark expert Richard Fitzpatrick catching a white tip shark for research at Great Barrier Reef, Australia.

Will Gadd paragliding off Lizard Island in the Great Barrier Reef in Queensland, Australia.

Photograph of Will Gadd canoing prior to his first attempt at paragliding from a small island about 20km east off Lizard Island in the Great Barrier Reef in Queensland

John Power, vulcanologist at the University of Alaska, Fairbanks, takes the temperature of the ground, which is over 80 degrees, on Mt. Augustine, an active Volcano in southern Alaska.

Will Gadd prepares to fly his paraglider over the Grand Canyon

Photograph of Will Gadd canoing prior to his first attempt at paragliding from a small island about 20km east off Lizard Island in the Great Barrier Reef in Queensland

Underwater shot of Will Gadd with potato cod at Great Barrier Reef, Australia.

Night shot of crew's tent in Alaskan mountain range.