The world’s largest steam locomotive, the Big Boy steam engine departed from the Union Pacific Rail track for a fall excursion to Greeley, Colorado.
Designed to transport freight over mountains during World War II, Big Boy steam engine #4014 is the world’s largest steam locomotive ever manufactured.
One of 25 built, #4014 was stored at the Union Pacific Rail track before being rebuilt and put back into service 6 years ago. Much to the delight of train enthusiasts…