Blair Castle
Visit glen lyon as part of a highly personalized small group tour of scotland.
http://www.glenlyon.50megs.com/blair_castle_scotland.html
Castle Campbell
Castle campbell feature page on undiscovered scotland: the ultimate online guide.
http://www.undiscoveredscotland.co.uk/dollar/castlecampbell/index.html
Edinburgh Castle
Edinburgh castle, guards the capital of scotland
http://www.scotland-calling.com/forts/edinburgh.htm
Stirling Castle
Argyll & sutherland highlanders
http://www.argylls.co.uk/