Grotesque gargoyles leer from on high, sinister owls guard the courtyard and the house is even home to one of the UK's largest colonies of rare bats!
It was mysteriously abandoned during construction in 1868 and, after years untouched, a trust was founded in 1989 to save the unique listed building.
Woodchester Mansion: spooky to look at and home to ghosts and bats
The mansion, is said to be home to a headless horse and a floating coffin.
Staff working for the charitable trust that now owns the mansion have reported strange noises, banging, and voices - one has even had her hair pulled and her camera switched off.
Woodchester has gruesome gargoyles galore
A live satellite TV broadcast from the mansion during the night of the summer solstice in 2003 saw mediums contacting two spirits.
The TV team found several murders had been committed at Woodchester including a servant girl who was strangled and a builder around 1840.
The ghostly party includes a headless Roman centurion, a ragged dwarf, a black dog and a coffin that hovers above one of the estate's lakes, which possibly belonged to a Dominican friar who killed himself by drowning!
Not only that but the ghosts of two WWII American servicemen have been seen walking in the park.
The area was occupied by the Romans, who built Woodchester's fantastic mosaic pavement, and American troops were also stationed in the area during the war.