Carol invites Holly to go monster hunting inside the most dreadful, looming, and haunted castle in all of Scotland.   Sources: https://oklahoman.com/article/3497722/glamis-castle-scotlands-most-haunted-residence https://www.glamis-castle.co.uk/ https://www.highlandtitles.com/blog/gruesome-ghosts-of-glamis/ https://www.smithsonianmag.com/history/the-monster-of-glamis-92015626/ https://www.spookyisles.com/haunted-glamis-castle-facts/ https://en.wikipedia.org/wiki/Glamis_Castle http://www.ghost-story.co.uk/index.php/haunted-buildings/haunted-castles/236-glamis-castle-strathmore-scotland https://scotlandwelcomesyou.com/glamis-castle/ https://amyscrypt.com/edinburgh-castle-scotland-haunted-ghosts/ https://glamiscalling.org/