Biggest-Ever Built: Facts About the Historic Big Boy No. 4014
As Big Boy No. 4014 begins its Westward Bound Tour, Union Pacific reminds onlookers of the size, mechanics and history that make the Big Boy so special.
As Big Boy No. 4014 begins its Westward Bound Tour, Union Pacific reminds onlookers of the size, mechanics and history that make the Big Boy so special.