I'd have to agree with therising, Big Lots is really creepy, as is Kmart, followed by Walmart, and Tops.
Main Place Mall is very creepy and Eastern Hills Mall has been, but won't be for long it seems.
The backstage dressing rooms at Shea's are dark and dank.
Kleinhans has underground tunnels that are stark and echo--that's always good for a thrill....
Richardson Towers--VERY creepy!