Youtube user bananenbuurman, has an impressive collection of LEGO trains. I’m particularily fond of the First Person view of this track that goes through an underwater tunnel. It’s pretty cool because of the scale, everything seems faster then it is, (it could be speed up, but it doesn’t need to be). I watched the whole thing, and it’s basically the same loop, over and over, but each time it looks like the train is going to de-rail when it goes around the bend into the tunnel. Also, some of the joints seem like they’re just kind of thrown together, and the train should not have smoothly transitioned over them.
I think it’s pretty cool though, there’s just something about trains.
If you watch this video, you can see the overall view of the setup:
Here’s another outdoor video: