So a bijillion composers, including Heitor Villa-Lobos, George Antheil, Pierre Schaeffer, Steve Reich, and Harry Partch, have used train sounds or idioms in their music. It's been done, like, a LOT. Bearing that in mind, here is my little piece that uses the sound of the coal train that passes about fifty yards from the grandparents' house. Also featured is the sound of an outdoor dinner bell, which I never noticed here before today, but which is pretty entertaining; and some windchimes with much waveform manipulating.
For the original train recording piece, check it out here. Because you don't have to take MY word for it. Ba-dum-bump.