Good Places For Paranormal Activity?

Hello. I know it has been a while, but my friends and I have been looking around our county for new places to...inspect. We have not found many haunted places that have piqued our interest, and we have been searching for the better part of half of a year. Does anyone have any good recommendations? It would be preferred that the areas in question are within Minnesota. Anything from Wisconsin can also be considered, but we aren't sure how hard getting through to there will be.