Conneaut Historical Railroad Museum
363 Depot Street
Conneaut, Ohio

I have visited this museum.  I found it rather interesting.

This museum seems to be open to the public each year starting on Memorial Day, but seems to be open also on the 2nd Saturday of May for Masons who attend the Nickel Plate Night 3rd Degree that is held each year at Evergreen Lodge No. 222 in Conneaut, Ohio.