My ancestor's castle near Haltwhistle, England is reportedly haunted because of a wedding party gone wrong. One version of the story:

"Featherstone Castle is the home of one of our more famous ghost stories concerning Abigail Featherstonehaugh, who lived in the late 17th century. Legend says she was to marry a neighbouring Baron’s son, but was in love with a local Ridley. As the bridal party rode the bounds of the estate, the spurned lover made an attack, but the new bridegroom put up a good fight. All were killed in the fray. At midnight the sound of horses’ hooves were heard outside the castle, the door opened into the banqueting hall and the ghostly apparition of Abigail and the rest of the party entered. The Baron fainted at this spectral procession. It is claimed the ghostly wedding party can be seen each 17th January in Pynkin’s Cleugh, a narrow valley just over the river from the Castle."

Somebody is apparently making a movie about it: https://www.youtube.com/watch?v=sztqaoaUQzM


https://www.heartofhadrianswall.com/forts-and-castles/83-featherstone-castle#:~:text=Legend%20says%20she%20was%20to,were%20killed%20in%20the%20fray.