Duart Castle, Isle of Mull, Scotland [if you're a McClean/McLean, etc, you sign a special guest book]. My great great grandmother was a McClean/McClain (there are many spellings). I hope I can visit the home of my ancestors someday.
Yester Castle is a ruined castle, located miles km) south east of the village of Gifford in East Lothian, Scotland. The only remaining structure is the subterranean Goblin Ha' or Hobgoblin Ha' (Goblin Hall).