Long Way Down

This glass-bottomed, U-shaped cantilever structure spans 70 ft (21 m) and juts out over the brim of the Grand Canyon -- a supreme test for those with acrophobia.

canyon
Mountain climber Aron Ralston is trapped in an isolated canyon. Over the next five days, he examines his life and ends up amputating his own arm to free himself from the fallen boulder.

This 29-year-old has a head for heights and has been honing his death-defying skills since the age of five, with circus troupes around the globe.

For extreme sports junkies, hurling down the side of a mountain isn't nearly extreme enough, so the lure of an active volcano makes it all the more exciting.

A million years of flowing water and incessant wind has cut through the red and white beds of Navajo sandstone that form the sheer walls of Zion.

Plummeting towards earth, they had just 70 seconds to find their partner and get into position to claim the title of most freefallers in a formation.

The plunge of Angel Falls in Venezuela is so great that, before getting anywhere near the ground, much of the water is evaporated or carried away as fine mist by the wind.

Zorbing - effectively throwing yourself down a slope in a giant ball - has become the latest extreme sport craze to seize the world.

You need steep slopes for high-speed, yet plenty of room for opening a parachute. Also you need little or no wind as an unknown turbulence could kill you.

Rock climbing is a sport in which participants climb natural rock formations or artificial rock walls. The goal is to reach the summit of or pre-defined endpoint.