The world's largest operating steam train is in Denver. Union Pacific's legendary Big Boy No. 4014 locomotive made a pit stop ...

"Big Boy," a 1.2 million-pound locomotive, is back in Colorado after being restored to the world’s largest operating steam ...

Jimmy Kimmel gave a salute to “The Late Show With Stephen Colbert” — and blasted rival network CBS — on Thursday evening, ...

The world's largest steam locomotive chugged through Colorado Thursday as part of its limited summer tour. Here are some of ...