I had a brief visit to the Belfast and Moosehead Lake Railroad in Unity, Maine this past Sunday, August 26. I wasn't able to see anything moving, but I walked around the grounds and had a good chat with one of the volunteers there.
The station above has a ticket office to the left, and a little museum in the rest of the building. The volunteer told me that the items in the museum are on loan. It's a work in progress.
The steam engine is out of service, so they are using a 70-ton diesel to pull the train. Here's the steam engine by the turntable.
There are more photos in my tourist railroad photo gallery.
There is a great article on the Belfast and Moosehead Lake Railroad here that goes into the BML's history in great detail.