The ultimate thrill if you’ve a head for heights: Glass cage that hangs over the edge of 4km-high mountain in French Alps
Racing heartbeat, heavy breathing, nausea, trembling, chest pain, a sense of impending doom. These are the symptoms someone who's afraid of heights might be struck with if we brought them to this spot.
Arrayed below and before him would be the snowy summits of the French Alps including, to the south, the mighty Mont Blanc - Europe's highest mountain.
He might not want to look down, but if you were to direct his head that way he would see below his feet a sheer drop of 12,604ft. Just a thin sheet of reinforced glass stands between him and oblivion.

Not for acrophobics... The view from the Pas Dans Le Vide attraction at the summit of the Aiguille du Midi peak in the Mont Blanc Massif in the French Alps