The Southeastern Railway Museum is located at 3595 Buford Highway NW, in south west Duluth, GA. Formed in 1970 by the Atlanta Chapter of the NHRS, over the years it has accumulated an interesting collection of motive power, passenger coaches, freight cars, cabooses and maintenance of way equipment. In 2000, the museum was given the title of being Georgia's official transportation history museum. The museum is open 10.00-5.00 Thursday through Saturday throughout the year and offers educational field trips and tours.
There are many rail-related artefacts on display in the main museum building and the grounds contain the restored 1871 Duluth passenger train depot, and a G16/Park train ride. A model railroad is housed in Building 1. Visitors can take a short train ride on restored cabooses hauled by vintage diesel locomotives over track which runs the length of the property. The museum also works on the restoration of its collection on a rotating basis as funds allow.
I have visited a couple of times and the photos on this page are from both visits.