Ghostly footsteps and strange voices are reported at the Warbonnet Creek Battlefield Site near Harrison, Nebraska, where a minor skirmish and a famous duel between Buffalo Bill Cody and Cheyenne warrior Yellow Hair took place in 1876. The site's haunted reputation is tied to this violent history. Visitors have heard the disembodied sound of running footsteps through the woods and voices speaking in what some believe to be the Cheyenne language. A glowing green mist has been spotted near the Yellow Hair monument, which marks the spot where Cody killed and scalped the Cheyenne warrior. The area's paranormal activity is often attributed to its history as a site of violence and death, with the lingering energy of the skirmish felt by sensitive visitors.