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This is the Via Ferrata Peille, France.
There are many others:
A via ferrata (Italian for “iron road” … is a mountain route which is equipped with fixed cables, stemples, ladders, and bridges. The use of these allows otherwise isolated routes to be joined to create longer routes which are accessible to people with a wide range of climbing abilities. Walkers and climbers can follow via ferratas without needing to use their own ropes and belays, and without the risks associated with unprotected scrambling and climbing. They are found in a number of European countries, including Italy, Germany, France, Austria, Slovenia, Switzerland, Spain and Sweden; and a few places in the United States, Canada and England. The first via ferratas were built in the Dolomite mountain region of Italy during the First World War, to aid the movement of mountain infantry. …
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Great fun!
On this I might just get a few family members out…
DSD