People have reported that they have heard heavy footsteps walking around, Furniture moving on its own, also reported hearing doors open and hearing voices when they are there alone.
There's a great website that documents the haunted placed in NH:
http://www.newhampshire.com/about-nh...ed-places.aspx
I'd heard about the Town Hall being haunted but in all my years going in there, never experienced anything unusual or odd. It is a spooky-looking building.