For 400 years Dirleton Castle stood as a magnificent fortified residence for three successive noble families: the de Vauxs, the Haliburtons and the Ruthvens. Today, it is mainly famous for its beautiful gardens ~ Scotland
Bodiam Castle, England Bodiam Castle is arguably the finest example of medieval moated military architecture in Britain. It was built between 1385 and 1388 by Sir Edward Dalyngrigge, a veteran of the 100 Years War.
Blenheim Palace is a monumental country house situated in Woodstock, Oxfordshire, England, residence of the dukes of Marlborough. It is the only non-royal non-episcopal country house in England to hold the title of palace.
Kylemore Abbey in County Galway, Ireland. I've been there many times. It used to be an exclusive girls boarding school run by nuns. Some of the girls were smoking in the loo (bathroom) on one of my visits. There is a wonderful pottery shop there too.