Never made it to Oslo. Should be a very interesting place to visit. I know that the Marine Corps has a program in NORTHERN NORWAY of staged military equipment. Don't know the exact spot, and wouldn't expect you to visit it just for that, but I understand that they are hidden inside CAVES bigger than anyone's imagination. It's not TOP SECRET or anything like this, in fact, they even mention it in military magazines, even online.

Geographic Prepositioning Force [Norway Air-Landed Marine Expeditionary Brigade (NALME / Norway Air