Here are my favourite links.
1.
www.guide-to-castles-of-europe.blogspot.com A great website refreshingly different for stories and pictures about Castles and the characters in them.
2.
www.guide-to-castles-of-europe.com This is the type of website that interests people and gets them involved in their studies of History. My Father knows Stuart and they email a lot.
3.
www.englishmonarchs.co.uk Complete Guide to the English monarchy arranged by dynasties, also contains sections on the Crown Jewels, the Tower of London and the Royal Residences