According to folklore, Marion de la Bruyere's ghostly figure still creeps through the medieval ruins in the Shropshire countryside. There have also been reports of screams being heard - almost 900 years since her suicide.
Her story is one of a number published in a study of the paranormal in the UK during the last 25 years undertaken by researcher Lionel Fanthorpe, 74, from Cardiff.
The study provides a breakdown of Britain's spookiest places and focuses upon unexplained incidents reported to the police and leading paranormal organisations since the 1980s.
Legend suggests that, in the 1100s, Marion had a secret suitor called Arnold de Lys who got into the castle by a rope that Marion lowered over the battlements.
One night he betrayed her by leaving the rope available to his soldiers who entered the castle secretly and began murdering the inhabitants.
Realising how badly she was betrayed, Marion leapt out of bed, grabbed her treacherous lover's sword and killed him with it.
Then she leapt to her death from the top of the Pendover Tower. Her ghost is reportedly seen and her screams are heard.
Stories vary somewhat regarding the ghost itself. Some say it is this death dive that her ghost re-enacts, and you can hear her scream as she falls to the rocks below. Others say she used to be seen wandering around the base of the tower itself.
The ruin sits on a rocky outcrop overlooking the River Teme, consisting of a rectangular outer bailey.
The Hanging Tower is also supposed to be haunted by the sound of heavy breathing, attributed to a phantom soldier.