The grounds of Castle Archdale Park were once part of a grand estate belonging to the Archdale family, who arrived in 1614 during the Plantation of Ulster. The original castle was constructed a year later in 1615 by John Archdale, a Plantation undertaker from Norfolk. Built in a T-plan design, the castle featured a fortified bawn measuring 66 by 64 feet, with 15-foot-high walls and defensive flankers at each corner. Upon John’s death in 1621, the estate passed to his son, Edward.

According to long-standing accounts, the upper floors of the original castle were haunted by a spectral black dog—an omen of death in Irish folklore. Even animals seemed to sense something sinister. Horses reportedly refused to ascend beyond the second floor, rearing or panicking without apparent cause.

In 1641, Castle Archdale became the site of a devastating assault during the Irish Rebellion. Rory Maguire led a brutal campaign against Protestant settlers, mirroring the horrors witnessed at nearby Tully Castle. When his forces reached Castle Archdale, Edward Archdale’s children were trapped inside. The building was set ablaze, and all but one of the children perished. In a final act of bravery, the family nurse threw the youngest child from a window to safety before succumbing to the flames herself. Visitors to the ruins have reported sightings of a ghostly woman believed to be the nurse, seen wandering the grounds in silence. Others speak of hearing children’s cries in the dead of night—echoes of that tragic day.

The original 17th-century ruins still exist, partially concealed within the older woodland of the estate. Though overgrown, their presence is unmistakable.

In 1773, a grand Georgian mansion was constructed approximately a mile southwest of the old castle, surrounded by landscaped parkland. The estate later played a critical role in the Second World War, serving as the headquarters for RAF Castle Archdale—a flying boat base monitoring the North Atlantic for German U-boats. Aircraft from this site were vital in protecting Allied convoys. Today, some visitors claim that remnants of wartime still linger. Phantom aircraft engines, ghostly marching boots, and even full-bodied apparitions in RAF uniforms have been reported. One widely shared account tells of a figure in what appeared to be a Canadian or American airman’s uniform, silently standing near the old courtyard before vanishing into the trees.

After the war, the grand mansion was abandoned and eventually demolished in 1970. However, the original cobbled courtyard and whitewashed outbuildings remain. Now repurposed as a visitor centre and tearoom, these surviving structures continue to attract not only tourists—but, some say, spirits from the past.