On the way over to Braemar we stopped off at the Peel Ring of Lumphanan for a picnic lunch. Not a great deal is known about this earthwork, but it is of Norman origin, and was a secondary residence of the Durwards. Here is the Wiki entry for the site.
In the 19th century, local villagers used a level area inside the lower earthworks as a curling rink, and you can still see the outline.
In 1057 Macbeth was beheaded at Lumphanan after his defeat in battle.
Roddy Macleod's Blog 
A great slide for the Durward children.