The PS Adelaide is the oldest wooden-hulled paddlesteamer still operating anywhere in the world, and watching her leave the wharf under a head of steam is one of the more stirring sights in inland Australia. Built in 1866 and restored by volunteers over a decade, she makes regular one-hour cruises on the Murray, paddlewheel churning, boiler hissing, timber hull leaning slightly into the current.
You can walk through the engine room when the boat is docked and see the wood-fired boiler that drives the whole operation. The crew are enthusiasts rather than actors — they know the mechanics and the history in detail, and they'll answer questions. Book ahead in peak season; the Adelaide is small and fills quickly.