Some of these ghost stories stretch back hundreds of years and others are more recent.
And whether you believe in the paranormal or not, these stories of ghosts said to haunt castles, country homes and old pubs around Wales might send a shiver down your spine.
1. The spectre of Judge Jeffreys
Known as “The Hanging Judge”, Jeffreys – who was born in Wrexham – took charge of the Bloody Assizes in the 17th century.
The gruesome trials led to thousands of those suspected of treason being burned alive at the stake, hanged and beheaded.
Ghost hunter Iain Alderton claims he has a picture that shows a ghoulish figure in an archaic powdered wig – and it is staring right at the camera.
The snaps were taken at the Ilchester Arms in London, which is understood to have been one of Judge Jeffreys’ favourite watering holes.
2. Lady in Welsh Folk Dress, Llyn Peninsula
In January 2012, holiday maker Paul Feehan took a trip to Abersoch to enjoy the rambling countryside.
The Manchester-based property developer paused for a rest with a friend on a bench facing a lake in the area, and his friend promptly took out his phone and started filming the beautiful scenery.
Upon watching the video back, the pair discovered a dark figure standing just a few metres in the distance behind them. The figure barely moves for the duration of the video, and after doing research, Paul was convinced that the figure was a woman in Welsh traditional folk dress.
Others are not so sure, with some saying that the figure is actually just a person walking a dog.
3. Plas Teg House, Flintshire
A Jacobean country house, Plas Teg was built by Welsh politician Sir John Trevor in 1610.
There are believed to be more than 15 ghosts walking around the house, which was used as a local court where people were tried and hung.
Sir Trevor’s daughter, Dorothy, is believed to haunt the A541 that runs past Plas Teg and there are reported to have been many car accidents on the approach to the house with visitors who have “seen something” in the road.
A teenager named Elizabeth Trevor-Roper, who died in 1815 at the age of 16, was believed to have been pushed down a well by a man whose love she spurned.
She is also said to have been seen running through the house’s corridor.
4. Sker House, Porthcawl
The 800-year-old mansion was immortalised in the Victorian novel The Maid of Sker, which was based on the tale of Elizabeth Williams, who “died of a broken heart” after being locked in a room in the house by her father to prevent her from marrying her lover.
The house is known for its vivid and violent past. This included 16th century carnage against Catholics, upon whose faith the house was founded.
Witnesses have reportedly heard “high pitched screeching noises, screams and wailing cries”, and seen dark shadows and figures, more so in the room where Elizabeth is thought to have been locked away.
They have told of feeling unease and dread on entering the house, with some feeling physically sick.
5. Llandaff’s ghosts
Llandaff has five prominent ghost stories, which curiously date back to similar times. The first is the ghost of a young boy in blue who drowned whilst playing on the banks of the river Taff. His mother is also said to haunt the banks, and some onlookers have seen the figure of a lady wading through the river late at night.
Paranormal documenters in Wales have claimed that the mother is searching for the body of her son in the water.
Another lady, named Bella, committed suicide in the area just over 100 years ago, and is said to still be in haunting the Taff trail.
Finally is the ghost of man who committed suicide in the graveyard at Llandaff, he is said to poke those on the ghost tour, and follow them at a distance as they make their way around the area.
6. Craig Y Nos Castle
Craig y Nos was once a sanitorium for children with TB and the home of an opera star at the turn of the 20th century.
According to television’s Most Haunted crew, the salt cellar houses a “particularly nasty guy”.
The slab room where opera star Adelina Patti’s body was embalmed is also in the cellar.
In one room, famed TV psychic medium Derek Acorah said he felt as though a child had been pushed out of the window of one of the rooms.
And one photo seems to show the outline of what looks like a man in formal evening wear going up the stairs.
7. The White Lady of Prestatyn
Possibly the most famous and regularly reported ghost tale in north Wales. The White Lady of Prestatyn is said to haunt the promenade, walking alone and keeping her distance from those who are just out for a leisurely stroll.
The apparition is said to wear a flowing white dress, often walking between Rhyl and Prestatyn, often near the Nova gardens.
Many have reported that she is a nun and reads a bible.
One woman who claims to have seen her told BBC North Wales: “I went on holiday to Prestatyn in a caravan place called Lido caravan park, and I was strolling down the promenade at about sundown with my mother and sisters and we saw a white/blue transparent figure walking up and down the beach turning and looking at us every few feet.
“We were proper scared and the figure seemed to have their nose buried in a book. It was really scary and once we had gone to the end of the promenade and back the figure had gone.”
8. The Skirrid Inn
Many of the sightings and the hauntings on this list tell of ghosts observed from a distance, but the spirits of the Skirrid Mountain Inn are apparently a bit more keen to get acquainted with their guests.
As far back as 800 years ago, the Inn was used as a courthouse, where 182 felons were hanged from a beam in the building.
Visitors now report interactions with aggressive spirits, many feeling the sensation of a noose being tightened around their neck.
One medium also sensed the spirit of a middle-aged lady who died from consumption. The landlady later found out that the wife of Harry Price, who owned the building in the 18th century, died from consumption.
9. White Lady of Ewenny
In an area of Ewenny known as White Lady’s Meadow, a strange manifestation is said to appear. A lady dressed in white makes her way around the area and points to the same area of the land each time.
There is a local legend that says a man once offered to help the lady, and she asked him to take her hand, they walked together for a short time before she disappeared.
Reported sightings of a similar lady emanates from nearby Ogmore Castle, where a lady is said to roam the earth as penance for a crime she had committed.
Sightings have been less common in recent years, although the area remains with the nickname of White Lady’s Meadow.
10. Margam Castle, Neath Port Talbot
With its Gothic architecture, Margam Castle is an impressive spectacle.
The most prominent ghost in Margam Castle is believed to be Robert Scott, a former gamekeeper at the house.
He is apparently frequently seen ascending the staircase, and throws stones at those who try to contact him.
There have also been reports of Victorian children playing and giggling through the corridors and rooms of the castle and even moving objects.
11. Powis Castle
It dates back to 1200 and was once a military stronghold before being transformed into a fine home for wealthy families.
According to hauntedwales.co.uk, the Dukes Room and Ballroom Wing are said to be the most haunted parts of the castle.
A lady in black has been seen sitting in a chair near the fireplace in the Dukes Room and one visitor reported the feeling of a hand brush down their arm.
The piano has been heard to play on its own in the Ballroom Wing, along with the piano stool moving. Knocks on the doors and windows have also been heard when the castle is all locked up.
A lady wearing a mop cap who sits at the bottom of a bed has been witnessed by guests and workmen have reported feeling a hand on the back of their neck while walking down the stairs.
A child has also been seen, described as having long hair and dressed in green.
12. Llancaiach Fawr, Caerphilly
Built on the site of a medieval dwelling in 1550, Llancaiach Fawr is home to many ghosts and has been named as one of the most haunted places in the UK.
The man called it home for 35 years said he heard distinct and loud footsteps above him when watching TV in the living room.
He also claimed he saw a Victorian with a stove pipe hat and a black cloak rush past him in the garden.
There is often a pervading smell in the air, like lavender, violets or roast beef.
Among the ghosts said to haunt the building are the petticoat-wearing housekeeper Mattie who died tragically in one of the rooms, as well as a little boy who tugs at the hair and sleeves of visitors.
Original Llancaiach Fawr owner Edward Pritchard can be seen dressed in his Civil War outfit.
13. Ghostly goings on at the Thomas Arms Hotel, Llanelli
David said he was stunned when he checked the hallway CCTV from the night before and noticed a ghostly figure rise up out of the floor.
The video footage shows a strange white shape materialise from nowhere then move across the room.
14. Hitchhiking ghosts who seduce travellers
Yes, you read the right. Paranormal investigator Gavin Davies, the author of Ghost Sex, said in January 2015 that he was investigating a spate of incidents where unsuspecting drivers are seduced by hitchhiking ghouls.
One of them involved a Pembrokeshire man who told Mr Davies he was seduced by a figure disguised as a beautiful woman hitchhiking on the A40.
“He said that he was driving back from a date that hadn’t gone as planned.
“He saw a beautiful woman on the side of the road and he picked her up.”
Mr Davies said the man, known as “John,” then pulled over and took the mysterious woman into a public toilet.
He said the ghost then seduced John in terms too graphic to describe.
‘John’ wrote: “Then I started to smell something strange, at first I thought it was like a cigarette smell.
“I was choking, and I thought I was going to die. I was crying and everything. I was passing out.
“I just wanted a policeman to start banging on the window and save me.
“I pushed her back with all my force and there was not a pretty girl on me but some haggard, disgusting old woman with some kind of awful skin condition.
“I just screamed and screamed and she just vanished.”