Just some hints for interesting places:
Belgium
Antwerpen Vlaams Tram- en Autobusmuseum
Brussels Autoworld
Brussels Tram museum
Blegny Coal mine museum
Steam train Dendermonde – Puurs
Steam train Maldegem – Eeklo
Czech Republic
Ostrava Mining Museum in Landek Park
Kopřivnice Tatra museums
Mladá Boleslav Škoda automuseum
Prague Public transport museum
Germany
Dresden Tram museum
Freilassing Lokwelt Railway museum
Wernigerode Harzer Schmalspurbahnen
Köln Tram museum
Bochum Railway museum
Kirnitzschtalbahn
Düsseldorf Linie D Public transport museum
Krefeld Schluff Steam train
Moritzburg Weisseritztalbahn
Wuppertal Suspension railway
Königswinter Drachenfels Cog railroad
Luxembourg
Conservatoire National de Véhicules Historiques in Diekirch
Musée National Des Mines Rumelange
Luxembourg CFL Funicular
Luxembourg Panoramic elevator
Lithuania
The Netherlands
Apeldoorn De Veluwsche Stoomtrein Maatschappij
Stoomtrein Goes – Borsele
Stoomtram Hoorn – Medemblik
Arnhem Open air museum
Den Haag Louwman automobile museum
Eindhoven DAF Museum
Schagen Automuseum