The largest steam engine in the world is now back in Cheyenne Wyoming.

Please grab a snack, sit back and relax, and watch this old black and white video, from back in the day, of Ol' Big Boy as it leaves Cheyenne one last time.

History is made now that she is back. The history in this video will get your heart pumping with nostalgia as you see her leave Cheyenne on what was thought to be her last trip to and from the city.

There is even a song about the old engine in this video, a song that must have been long forgotten.

Big Boy No. 4014 has undergone restoration for the past two years. It is one of eight locomotives of its kind still in existence and the only working locomotive. It will leave the Cheyenne Depot on May 4th will a farewell ceremony and arrive in Ogden, Utah on May 9th.

Head on over to the Union Pacific website for the tour schedule of the locomotives as they will make whistle-stops along their journey.