Sailing teams attempt a 10-day race along British Columbia's inshore waters.
International rafting team navigates the Stikine River in British Columbia.
Divers attempt to break the underwater cave-diving record beneath the Caribbean island of Andros.
A family-owned demolition company uses dynamite to level bridges, skyscrapers.
Hang glider descends Angel Falls, Venezuela; man leaps from 3,000-foot waterfall.
Ron and Valerie Taylor research shark theories.
Documentary explores the factors that contribute to the severity and frequency of natural disasters.
Hot-air balloons traverse the Nepalese Himalayas.
Large-scale feats of construction and engineering.
A 1,000-mile sled-dog race follows the Gold Rush Trail along the Yukon.
Two men follow Australia's Great Barrier Reef in a microlight aircraft.