"Step into the void" - is observation deck made in the form of a cube. All faces of a cube are made of glass, and when you step inside, it seems that you are hovering over the precipice without any support at a height of 1035 meters. It's a little scary :-)
To get here and enjoy an array of Mont Blanc, you need to get to Chamonix town, from here you will need a cable car to reach the top. The cost is €57 per person (round trip). Then you need to pass a bridge across the chasm that connects the two rocks, and then use the lift inside the rock and go to the top of Aiguille du Midi - you are on the spot.
The name of the site is fully consistent with its essence - a transparent glass cube, suspended on a precipice on top of the Aiguille du Midi.18Chamonix