For the greatest rush, go where no man has gone before. Alaska Heliskiing, based in Haines, AK, can chopper you to untouched powder at several peaks over 1,200 miles of mountain ranges. No hot chocolate or green runs here—just gnarly first descents with up to 5,000 feet in vertical drop. No big deal. Terrain is restricted to brave adrenaline junkies only, and be warned: heliskiing isn’t for the faint hearted. Cost: $165 per run, or vacation packages from $5,000-$7,000.