This cache is very close to the "St. Jakobs-Stadium", Switzerland's biggest soccer stadium. Apart from playing soccer it is also often used as a venue for large open air concerts. I'm not sure if Nirvana have ever played here, but if they played in Switzerland, this would be one of the two or three places that would have qualified. Even if they have not played here, other guitar legends are sure to have played here.
As this is the closest to famous guitarists I'll likely be getting in the near future, I'm dropping it off here.