Below you will find links to locations that offer public ghost hunting tours.  They are well worth the trip.

Old South Pittsburge State Hospital - TN

Rolling Hills Asylum - Bethany, NY

David Stewart Farm (civil war hospital) - Gettysburg, PA 

St. Augustine Lighthouse - FL

Trans-Allegheny Lunatic Asylum - West VirginiaHoughton Mansion - MA Mansfield Prision - Ohio Fort Mifflin Battle Field - PA