FORT WORTH, Texas - The world's largest operating steam locomotive will be in Fort Worth through the weekend. Union Pacific's Big Boy No. 4014 will chug into Fort Worth to be on display Thursday.

The Union Pacific Big Boy No. 4014 is the world's largest operating steam locomotive. It will remain in Cowtown until Sunday, though it will not be on public display after Friday afternoon.

All the Latest Game Footage and Images from Train Simulator: Union Pacific Big Boy Loco Add-On The Union Pacific Railroad's Big Boy 4-8-8-4 steam locomotive is undoubtedly the beast of American ...