In its stunningly rugged location on a rocky outcrop high above the North Sea, Dunnottar Castle’s prominent role in Scottish history should come as no surprise. Walking the bridge, surrounded by the choppy blue void below, is a breath-taking experience no matter how many times you do it. Clan Keith gradually constructed the estate between the 13th and 17th centuries, although only a haunting set of ruins remain. Visitors should note that, given its severely defensive placement, Dunnottar is a relatively inaccessible castle, although the views are more than worth the effort.