Built in the early 1800s, Charleville Castle is a Gothic revival mansion with a dark reputation. It is said to be haunted by the spirit of Harriet, the eight-year-old daughter of the third Earl of Charleville, who died tragically after falling down the main staircase. Visitors report hearing a child’s laughter, doors slamming, and cold spots throughout the halls. The castle has been featured on shows such as Most Haunted and Scariest Places on Earth, cementing its place as one of Ireland’s best-known haunted locations.