Charleville Castle near Tullamore, County Offaly, is a magnificent Gothic Revival castle designed by Francis Johnston and completed in 1812. The castle is haunted by the ghost of Harriet, the third Earl of Charleville's young daughter, who died after falling from the main staircase while playing. Her laughter has been heard echoing through the castle's vast halls, and her small figure has been seen running through the corridors and playing in the turret rooms. EVP recordings made in the castle have allegedly captured a child's voice saying her name.
Beyond Harriet, the castle is also associated with the ghost of a monk, seen in the dungeons, and a woman in a white dress who appears at the windows. The castle's extraordinary architectural features — including a massive gallery ceiling, turrets, and pointed Gothic arches — were designed to evoke the atmosphere of a medieval fortress, and the effect has proven more successful than the architect could have imagined. Charleville Castle sits within an ancient oak wood, and one oak tree on the grounds, known as the King Oak, is over 400 years old.
The combination of Gothic architecture, ancient woodland, and the tragedy of a child's death creates one of Ireland's most emotionally resonant haunted locations.