Look up anywhere in Edinburgh's old town and you'll see Edinburgh Castle, seeming to grow out of the blackened cold volcano that forms its plinth. There's evidence of human habitation on this spot that dates back to 900 BC, and the Castle has been a royal stronghold since the Middle Ages.
The place is steeped in history. There’s the Honours of Scotland – the oldest crown jewels in the United Kingdom, no less – and the Stone of Destiny, the coronation seat of ancient kings. There’s St Margaret’s Chapel, Edinburgh’s oldest building, and a cluster of military museums. You can take guided tours and see costumed performers bring the history of the Castle to life.
Enter the Edinburgh Castle through the Esplanade, where you might be lucky enough to see the changing of the guard (it happens on the hour). Allow at least a couple of hours to roam around the castle - there are several museums and the palace buildings within its walls.