Standing high atop volcanic rock, Dunstaffnage commands the hills and lochs that surround it. That is why this 13th-century castle was so strategic and fought over between those battling for control of the kingdom of Argyll. From the walk along the walls you have outstanding views across the Sound of Mull and the Firth of Lorne. A small well-illustrated guidebook (£2.50) lets you take your own guided tour, but there are story boards throughout the building that give you a sense of how it was used across the ages. In the woods is the ruined chapel of St. Cuthbert, built by the Macdougall clan at the same time as the castle.