Birkwood Castle, located in Lesmahagow, Scotland, is a Gothic country house with a spooky reputation. Built in the 18th century and expanded over the years, it was once used as a hospital for children with learning disabilities before closing in 2005. The castle has been the subject of ghostlore stories, with tales of cigar-smoking spirits and haunted happenings. Despite plans for redevelopment as a hotel falling through, the castle remains standing, albeit with some structural concerns.