Union Pacific 4014 (en.wikipedia.org)

So many cool facts about this locomotive, but imho the coolest is it is still called upon between events to add power to stalled freight trains when needed and geographically favorable. Highly recommend seeing it in person when convenient. Heavier than a 747 and can put out ~138k lbf of torque.

UP sends 4014 out on tour every 2 years or so. It's supposed to go on tour next summer, but I don't think the schedule has been announced.

It's worth seeing it at a whistle stop. I caught it in Greeley CO in 2024. It's noisy and clearly of another time.