At the Départ en Vacances exhibit in the Grand Duchy.
As a proud Luxembourg-American who heads back to the old country for the occasional road trip, I'm always on the lookout for interesting automotive stuff while in the Grand Duchy (a 1,000-square-mile nation located between France, Belgium and Germany).
The Conservatoire National de Véhicules Historiques is located in Diekirch, an ancient baking and brewing town in Luxembourg's northeast. It's about five miles from the German border and a three-hour drive from Frankfurt (Paris and Brussels are within easy—by American standards—driving distance as well). Because some of the pivotal action of the Battle of the Bulge took place in the area, the Musée National d'Histoire Militaire is also in Diekirch.