And this is not just any steam train we're talking about – it's one of the world's few remaining zig zags, which were invented to enable challenging climbs to be made with only the bare minimum of tunnels and earthworks.
Besides admiring the typically splendid Blue Mountains scenery, you'll marvel at the engineering skills that allowed 19th century locomotives to puff their way up and down terrain as steep and rugged as that of the Lithgow Valley.
There are at least three trips per day (excluding Christmas) – click here for information about times and prices.
In an extra special treat for the young'uns, Thomas the Tank Engine fans can enjoy a Day Out With Thomas, while Harry Potter lovers can step aboard the Wizards Express. However, these are irregular events that cost extra and require reservations.
To plan your trip, whether travelling by car, bus or train, click here.
And if you intend to spend the night in Lithgow, you'll probably want to know what the town can offer in the way of accommodation and attractions.