The Union Pacific Big Boy 4014 is the largest steam engine locomotive currently operating in the world. Read more about it here:https://en.wikipedia.org/wiki/Union_Pacific_4014
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UP Big Boy #4014 in Ankeny and Des Moines, Iowa
The Union Pacific Big Boy 4014 is the largest steam engine locomotive currently operating in the world. Read more about it here: https://en.wikipedia.org/wiki/Union_Pacific_4014