The Clarkson Historical Opera House (also known as the Z.C.B.J. Opera House) in Clarkson, Nebraska, is rumored to be haunted due to its history as the 1903 Charter Hotel. Paranormal experiences reported there include ghostly laughter, apparitions, and mysterious figures. Visitors and paranormal investigators report seeing vague, dark figures moving throughout the building. Apparitions, sometimes dressed in period-appropriate clothing, have been seen, which may be connected to the building's time as a hotel. The sound of disembodied laughter is sometimes heard within the opera house. Witnesses have reported hearing footsteps running down the aisles when no one is there. Some visitors report a general sense of unease or the feeling of not being alone. The opera house has allowed paranormal investigators to conduct research inside, and some owners have said they find the reported activity fascinating and not demonic. Instead, they describe it as a "residual energy". Tours and investigations are occasionally held at the building.