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Abandoned mine train in Canada's Bankhead ghost town
(reddthat.com)
Bankhead was an old mining town on the Cascade Mountain (Alberta, Canada).
The area's now in Banff National Park and the town is a tourist attraction, so it's not quite as abandoned as some of the places posted here.
I was imagining a boiler explosion in a mine with a tank like that. Usually they just used minecarts attached to a steam donkey on the surface.