This layout covers the last 19 miles of the Healesville line from Mooroolbark to Healesville, set in approximately 1913-1920, prior to the line to Lilydale being electrified, and during the period when the locomotives were painted Canadian Red.

This line features changing grades, the famous 'Tunnel Hill' tunnel and multiple bridges. Some of the highlights along the line include the Cave Hill quarry; the Tunnel Hill runnel, and the 1.5 mile long bridge over the Yarra Flats floodplain and Yarra River near the township of Yarra Glen.