There's s a mostly-volunteer organisation not far from here that runs narrow-gauge trains on the former rural 2'6" rail lines. https://en.m.wikipedia.org/wiki/PuffingBillyRailway
They are the only organisation in the state of Victoria that's permitted to train & instruct steam engine drivers.
Another volunteer organisation runs annual trips on the main rail lines using old mainline locos, some of which were converted from coal to oil in the 1950s. The Puffing Billy Railway is restoring a Garratt loco that has the same tractive effort as one of the older mainline locos.

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