Kansas may seem like a quiet state but the hauntings are loud. Atchison, Kansas and the Hollenberg Pony Express Station make sure you hear the ghosts. 

Sources:
https://en.wikipedia.org/wiki/Hollenberg_Pony_Express_Station
https://www.legendsofamerica.com/ks-hollenberg/
https://www.kansashauntedhouses.com/real-haunt/hollenberg-pony-express-station.html
https://anomalien.com/the-romance-of-the-pony-express-and-haunted-hollenberg-station/
https://seeksghosts.blogspot.com/2011/09/pony-express-and-haunted-hollenberg.html
https://paranormal.lovetoknow.com/ghosts-hauntings/haunted-places-kansas
https://insidemystery.com/haunted-history/the-haunted-pony-express
https://hauntsofamerica.blogspot.com/2007/09/haunting-of-pony-express-hollenberg.html
https://seeksghosts.blogspot.com/2011/09/