Some more I found.
Unknown
http://picturrs.com/files/funzug/imgs/travel/castles_amazing_12.jpgKilkenny Castle (even the Irish wanted to kill Kenny)
Castile de la Mota (Spain)
Kasteel de Haar (Netherlands)
Guaita (San Marino)
Lichtenstein Castle (you just shit yourself, I know)
Burg Hochosterwitz (Austria)
Alcazar de Segovia (alcazar is a type of castle, this is the most famous one)
Burg Eltz (German)
Burg Satzvey
Burg Altena
Chateau Frontenac (Quebec) [not a castle per se]
Alnwick Castle (aka Hogwarts)
Ashford Castle
Hunyad (Romania)
Leeds Castle (England)
Lowenburg (modern)
Mont St. Michael
Chateau de Sully
Chateau de Chenonceau
Chateau de Challain (because Dracula's castle is essentially a chateau)
Chateau de Chantilly
Chateau de Saumur
Trakai Castle (Lithuania, pre-modern)
Dunrobin (Scottish)