This is a pretty good video, showing an exploration of the underground tunnels in the old Michigan State Prison in Jackson (called the "Jackson Armory" years later, now the "Armory Arts Village").

I've been through those tunnels myself - and in the solitary confinement cells - and I can understand why there are those who believe it's haunted.

Very historical, very interesting, very recommended location for you to visit...even if you're NOT a ghost hunter. Take a look!