Big Boy Locomotive

Photos of the awesome Big Boy locomotive 4012, now preserved at SteamTown USA in Scranton, Pennsylvania. This is among the largest locomotives ever built.

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Big Boy 4012

This is the awesome Big Boy 4012 at Steamtown in Scranton, Pennsylvania. These were among the largest and most powerful locomotives ever built.

Big Boy Locomotive steam engine Steamtown union pacific Mallet train railroad Big Boy Locomotive 4012 Scranton