Chateau Kežmarok - Slovakia
Although the museum in the castle is neither technical nor cycling, it hides one a very interesting home made high wheel.
Concakt: https://www.kezmarok.com
Photos: with many thanks Juraj Kita
album: 258 - Chateaux Kežmarok
Transport museum, Bratislava, Slovakia 
This Museum has some bicycles on store and some from them are very rare.
Contact: http://www.muzeumdopravy.com/
Photo by Boris Majerov - http://www.facebook.com/Tyrnaviavelo
album: 56 - Transport museum - Slovakia