Editor's Note: Tuesday's timing schedule for the Union Pacific 4014 Big Boy in Nokomis, Illinois has changed. The latest information can be found here. Our original story continues below.

Big Boy 4014 is one of 25 built in the 1940s. It was designed to conquer the steep grades of Utah's Wasatch Mountains during World War II. Officials say only eight of the 25 survive to this day ...

The Union Pacific Big Boy 4014 was introduced in 1941 as the world’s largest steam locomotive. Following a ceremonial outing in Nebraska, the Big Boy jumped in to save a stuck freighter on a ...