Wikipedia
Daubenhorn
Located above the town of Leukerbad, the Daubenhorn is a mountain in the Bernese Alps known for having the longest Via Ferrata in Switzerland built into its Southeast rock face which allows access to the summit.
This via ferrata is considered to be extremely difficult (ED) and requires very good fitness to make the 6 hour climb to the summit from the base of the Via Ferrata at 2350 m. In addition, it is also possible to reach the summit by trekking a circuitous route starting from Gemmi Pass.