The ancestral seat of the Maclean clan enjoys a spectacular position on a rocky outcrop overlooking the Sound of Mull. Originally built in the 13th century, it was abandoned for 160 years before a 1912 restoration. As well as dungeons, courtyard and battlements with memorable views, there's lots of clan history – none worse than the story of Lachlan Cattanach, who took his wife on an outing to an island in the strait, then left her there to drown when the tide came in.
A bus to the castle meets some of the incoming ferries at Craignure (£11 return including castle entrance), but it's a pretty walk to get here, too.