Built in 1878 as Knox County’s Poor House, the modern day House of Nightmares is said to be haunted. Shallow unmarked graves were found surrounding the building in recent years while development took place in the area. When a bible college moved into the building in the 1950s, an elevator crashed killing everyone inside. Signs of clothes and other rotting living things are seen in the basement.

Many apparitions have been seen in and around the building. Cold spots drift through the halls and sometimes voices can be heard. Presently the place is home to a staged haunted attraction during Halloween.

The ghost of a child is said to be seen peering out the windows on occasion. The mansion itself is said to have secret underground passageways that connect it to the family vault of Henry B. Curtis, the builder of the mansion. He was an Abolitionist who used the vault to conceal slaves along the Underground Railroad. The family's crypt is located in nearby Mound View Cemetery.

I just recently made a trip to Curtis Mansion didn't get a chance to get inside of the mansion but i happen to see a ghost of a small child looking out the window by time i got to take other picture the ghost of the small child was gone.Could the ghost of the small child be a slave that Henry B Curtis was hiding in his basement.I'm not sure if anyone will find out the identity of the ghost of the small child.

You are not safe even in the campus chapel. There are two different accounts of haunting-related events in the church. A common belief is that the Church is cursed. Most churches in the 19th century were built in the shape of crosses on the East-West line, with the altar facing East to celebrate Christ’s death and resurrection every day. However, the Church of the Holy Spirit is built on the North-South axis and faces South: it is, in essence, an upside-down cross. Also, though there is no official record of any fire in the Church, there are scorch marks beneath the windows of the chapel: the catch, however, is that the marks are facing down, indicating that the Church burned from the top to the bottom, defying the laws of physics as it did so.

The second story is of an actual haunting. If you go into the Church late at night by yourself, perhaps you will catch a glimpse of the priest’s ghost, a pitch-black shape in the dark recess under the choir loft. Years ago, a priest was said to have gone crazy and locked himself in the office of the Church. The story goes that he hung himself in the belltower and is now condemned to haunt the church.