Union Pacific Big Boy, the largest, most powerful steam locomotive in the world, tours the U.S.

Thousands line the tracks as Big Boy rolls through South Philly

Union Pacific's ‘Big Boy' locomotive makes its way to South Philly

History of the 4014 Big Boy Steam Locomotive #train #bigboy #steamtrain #history

Keeping Union Pacific's Big Boy No. 4014 Lubricated

"Big Boy" #4014 Steam Locomotive Departing Lorain Ohio - #train #steamlocomotive #railway

Union Pacific Big Boy 4014 is Crossing America