The biggest operating steam locomotive in the world will stop in Illinois this week. Here's when and where to catch the "Big Boy." ...

Union Pacific's "Big Boy Number 4014" is the world's largest operating steam locomotive. Spectators had a chance to see the historic train in West Chicago.

The world's largest steam locomotive passed through Illinois this week. See when the 'Big Boy' train is coming back.

To Matt Vida, the Union Pacific’s Big Boy No. 4014 is not just the world’s largest operating steam locomotive. The 600-ton locomotive is an icon to the 38-year-old St. Charles man, who saw Big Boy for ...

The world’s largest operating steam locomotive will anchor a festival atmosphere next week when it rumbles into West Chicago. Union Pacific’s Big Boy No. 4014 is scheduled to arrive Tuesday evening in ...

WEST CHICAGO, Ill. — The largest steam locomotive in the world is in the Chicago area. The 1.2 million-pound Big Boy No. 4014 locomotive will be on display for visitors in West Chicago Wednesday. The ...