Terrifying Walk to the Heaven's Gate Mountain on a freaking Glassed Sky-walker.
On one side a sheer rock face, on the opposite a 4,000ft drop - and every one to separate the brave mortal from a deadly plunge may be a 3ft-wide, 2.5in thick path.
And if that's not enough to bring terror into Inferno of your abdomen, the trail running aboard a Chinese incline is created out of glass, permitting a crystal-clear read of wherever one false step will take you.
