Aside from cars what other machinery do you like?

Aside from cars I am a big vintage railroad fan. Being from Nebraska (birthplace of the Union Pacific) its a great pride of mine to see their steam program run through every year. I am waiting impatiently for them to finish restoring this Big Boy (literally that is the name this class of locomotive). Largest locomotive ever built (arguably with the 2-6-6-6 Allegheny and 2-8-8-4 Yellowstone) and only built for the Union Pacific.
Here is a link to the monsters. 4014 should be in operation within 3-5 years
https://www.youtube.com/watch?v=x8f9VFlNyDQ
Here is a link to the monsters. 4014 should be in operation within 3-5 years
https://www.youtube.com/watch?v=x8f9VFlNyDQ