The paranormal findings in Minnesota are off the charts. The stories of both Karen and Jenni contain unusual phenomena. The Crooked Key Podcast looks at Nopeming Sanatorium and West Hills. 

Sources:
http://orphanagemuseum.com/
https://en.wikipedia.org/wiki/Minnesota_State_Public_School_for_Dependent_and_Neglected_Children
https://www.ghostquest.net/haunted-places-minnesota-usa.html#:~:text=The%20Minnesota%20State%20Public%20School%20Orphanage%20Museum%20is,and%20objects%20being%20moved%20by%20an%20unseen%20entity.
https://www.minnesotahauntedhouses.com/real-haunt/west-hills.html
https://www.southernminn.com/owatonna_peoples_press/archives/article_35cfd925-66af-572c-90da-e7cd5c245be7.html