Caerphilly Castle

Dominating the landscape of Caerphilly with its massive concentric walls and vast moat, Caerphilly Castle is a masterpiece of medieval military engineering — and one of the most haunted castles in Wales. Built between 1268 and 1271 by Gilbert “the Red” de Clare, a powerful Anglo-Norman nobleman, the castle served as both fortress and political statement during the turbulent wars between the Welsh princes and the English crown. Caerphilly’s scale is second only to Windsor Castle, its towers and battlements casting a commanding shadow over the surrounding valley. Yet beneath the grandeur and history of conquest lies a tale of forbidden love, tragedy, and an enduring haunting — that of the Green Lady, one of Wales’s most famous ghosts. According to legend, Gilbert de Clare’s wife, Alice de Clare, grew suspicious of her husband’s affection for a beautiful Welsh woman named Princess Alice of Angharad, who lived near the castle. Gilbert’s affair with the young princess was discovered, and in a fit of jealousy and vengeance, Alice betrayed her rival, resulting in the Welsh woman’s imprisonment and eventual death. Her grief and betrayal were said to be so intense that her spirit could not rest. Ever since, her ghost — known as the Green Lady of Caerphilly — has been seen wandering the castle’s corridors, ramparts, and great hall. Witnesses describe her as ethereal and luminous, draped in green robes, her face filled with sorrow. Some say she appears weeping beside the castle’s great lake, while others have seen her gliding silently along the battlements before vanishing into the mist. In addition to the Green Lady, the castle is associated with other ghostly phenomena. Staff and visitors have reported unexplained footsteps, murmured voices, and the sound of clanking armour echoing through the halls after dark. One of the most chilling experiences involves the leaning south-east tower, which locals claim leans because it was struck by the hand of the Devil himself. Legend has it that during its construction, dark forces were displeased with the castle’s rising strength and cursed the tower to tilt — a mark of infernal anger that remains to this day. Some modern visitors have reported feeling a sudden drop in temperature or a weight of sadness when entering certain chambers, particularly those overlooking the moat. Paranormal investigators have captured EVP recordings of indistinct female crying, believed to be the voice of the Green Lady, as well as light anomalies near the chapel area. Though Caerphilly Castle is now under the care of Cadw, the Welsh heritage organisation, its atmosphere remains charged with centuries of conflict and emotion. It has served as the backdrop for films and TV series, yet no production can fully capture the strange, melancholy energy that pervades the site. By day, Caerphilly Castle is a majestic ruin — a monument to medieval power and Welsh resistance. By night, it becomes something else entirely: a place where history breathes, love lingers, and a betrayed spirit still searches for peace beneath the moonlit towers.