Iona is special. An ancient island of Celtic Christendom, it houses an ancient and still very active abbey, chock full of Celtic and Viking remains. In the graveyard outside Scotland's ancient kings, including Macbeth, rub their bones. The late Labour leader John Smith is also buried there in a simple grave. After you've done the history, check out the beaches, which have pure white sand as fine as icing sugar. Better than the Caribbean.