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Great Western Railway steam rail motor at Didcot Railway Centre in England.
This thing is extremely rare. It's the only working steam-driven railcar/doodlebug in the Anglosphere, AFAIK. This museum has another beyond rare feature: operational Brunel gauge (7 ft and 1/4 in) track. They have one operational replica Brunel steam locomotive that runs on it, though it's being overhauled, currently. Very cool museum
