The micro car museum is somewhere near Boston. If you are into aircraft, as well as the two above, there is an 'Airfield Trail' of some of the smaller wartime airfield sites, some of which have small museums attached. They are also in the process of building a new memorial centre to Bomber Command on the outskirts of Lincoln, the monument, a spire the hight of a Lancaster wingspan, is already in place with a big visitor centre due to open next year.
