Photogenically sited at the entrance to Loch Duich, Eilean Donan is one of Scotland’s most evocative castles and must now be represented in millions of photo albums. It’s on an offshore islet, elegantly linked to the mainland by a stone-arched bridge. It’s very much a recreation inside, with an excellent introductory exhibition. Citylink buses from Fort William and Inverness to Portree stop opposite the castle. The last entry is strictly one hour before closing.