World’s largest steam engine — Big Boy — headed to Western Pa.

Something big is coming to Western Pennsylvania. The world’s largest operating steam engine, Union Pacific Big Boy 4014, is ...

Union Pacific’s Big Boy steam locomotive to come through Cambria County; South Fork plans activities

The world's largest operating steam locomotive is set to roll through the area. The Union Pacific’s famed Big Boy No. 4014 is journeying through the East Coast for the first time in ...