Franklin Castle in Ohio. Secret rooms and passages do exist inside the castle, although it is not known how many. Hannes Tiedemann supposedly used a secret room to store the bodies of his dead babies, and killed his niece in a hidden passage by the ballroom. His wife is said to have used a passage to safely gain access to her children, away from the prying eyes of her tyrannical husband.
Craigdarroch Castle was built in the 1890s for wealthy coal baron, Robert Dunsmuir and his wife Joan. Piano music in the ballroom and the smell of candles have been detected. The ghost of Joan Dunsmuir has been sighted in her bedroom. For some reason, only in winter, the apparition of a woman dressed in white has been seen in the ballroom window. Victoria BC