Forsvarets Flysamling Gardermoen
This is the Norwegian Armed Forces Aircraft Collection, located at the other side of Gardermoen airport next to a long term car park, to which (free?) buses travel often. If, like me, you are into aircraft museums, that one is well worth a visit - I've been there twice (driving 4 1/2 hours from Gothenburg each time) which probably shows how much I like it!