The Forsvars- og Garnisons Museum is housed in one of the hangars of the former German seaplane base Aalborg See. So 'off airport' is not quite correct.
A 10TFW/509TFS "Pirates" Hog from RAF Alconbury on static display at the 1991 RAF Finningley Battle of Britain at home day Airshow, The Alconbury A-10s began returning to the States in Oct 91 as part of the CFE Treaty.