One of the most notorious ski runs in the world, let alone the States, Corbet's Couloir at Jackson Hole boasts a near-vertical drop, and is hemmed in by rough rock, only 10 feet wide at its opening.

Nerves of steel are essential here and it's not uncommon for even the most experienced skier to wipe out immediately and free fall up to 20 feet, depending on conditions. A safer alternative is to watch from the nearby tram stop, which acts as a viewing gallery for the action.

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