The Rhymney House Hotel has a reputation for paranormal activity. Visitors and staff alike have reported seeing apparitions of people in various parts of the building. One of the most frequently reported sightings is that of a menacing shadow at the top of the stairs, which seems to move of its own accord. Other apparitional sightings include a phantom figure walking through what was once an external wall, as well as various other figures including a man with a rod and an old lady by the fire.

The Rhymney House Hotel is located in the town of Rhymney, which has a rich history dating back to the Industrial Revolution. The hotel itself was built during this period, and it's possible that the paranormal activity reported here is connected to the traumatic events of the time. Many people have reported seeing apparitions of children, which may be related to the fact that many young workers were employed in the local mines.