Ever since I was a kid I have had a great interest in castles and all things medieval.  I am sure that this interest was spurred in part by my love of fantasy novels as well as Dungeons and Dragons.  There is a certain romantic connotation to a sturdy stone fortress that houses a king and his chilvarous knights.  I realize that the reality of castles in the middle ages was quite a bit different but no matter.

When my wife and I planned our first visit to the UK we decided to visit as many castles as time would permit.  On subsequent trips we have had the opportunity to introduce our son Douglas to castle exploration. For our 15th wedding anniversary, we stayed a couple nights at Culcreuch castle in central Scotland. 
Here is a list of the castles that I have explored to date:

Tower of London - England                     Edinburgh Castle - Scotland
Tantallon Castle - Scotland                      Craigmillar Castle - Scotland
Dirleton Castle - Scotland                        The Drum - Scotland
Eileen Donan Castle - Scotland                 Dunvegan Castle - Scotland
Urqhart Castle - Scotland                        Crathes Castle - Scotland
Duart Castle - Scotland                           Torosay Castle - Scotland
Huntly Castle - Scotland                          Stalker Castle - Scotland
Doune Castle - Scotland                          Kildrummy Castle - Scotland
Holyrood Palace - Scotland                      Culcreuch Castle - Scotland
Caernarfon Castle - Wales                       Beaumaris Castle - Wales
Harlech Castle - Wales                            Caerphilly Castle - Wales
Caldicott Castle - Wales                           Palace of Versailles - France
Smailholm Tower - Scotland