There are also some great aircraft (and parts) in Brussels, such as a Nieuport, Camel, original condition Halberstadt C.V an a host of other unique aircraft. I visited that a few years ago and their collection is nothing short of amazing. The rest of the museum is worth a visit, too.
And, every year, there is the great airshow at La Ferté Alais, which usually features some of the real ones (or the almost real-replica's such as the BMW D.VII from the WNW manuals) from the Mémorial Flight in action.
As for my own little country (the Netherlands), we have the BAT FK23 Bantam (really post war) and a D.VII at Soesterberg's museum. There's another D.VII at the Aviodrome, that has some original parts (Mercedes engine, radiator and such).