In this mountainridge the Swiss Bundesratsbunker a.k.a. Führungsanlage K20 is located (Swiss leadership bunker).
This one has 2 known emergency exits; one an a mountain above the Gasterntal and the other in the old Lötschbergtunnel.
There are more "secret" leadership bunkers througout Switzerland; check the other locations at this website.
Article "Der Spiegel":
Tunnel blueprint (Lötschberg Base Tunnel):
Photo impression "Der Spiegel":
Search for Führungsanlage K20, Kandersteg