When in Canada I heard about a spiral tunnel used by trains. That sounded like fun to me. Faster Daddy, go faster. Alas we are talking about Canadian freight trains which cautiously crawl all over the country's often very rough terrain, so there is no speed involved here.
The spiral tunnels replaced a very steep but only temporary new train line at Kicking Horse Pass to link Canada's west coast to the east.
I've looked at several clips and found what I think is the best one to demonstrate the tunnels. Hmm, I like the music that accompanies the clip but there is no information about the track. I knew one day there would be a use for Shazam when I first downloaded it to my phone many years ago and it resides on my newest phone. It only took a couple of notes for Shazam to tell me the track is called "The Devil's Gotta' Earn", by US born and very talented Brett Detar. He is not too shabby in my view. Well, sorry, he is shabby, but cultivated shabby.