My grandparents lived close to the railroad tracks so I had my fill of modern trains from that. My modern might be old .
I remember the aluminum passenger trains going by as a kid.
Those had disappeared by the time I was an adult . At least in this area.
I've ridden some "tourist" trains.
I'll start with the Sad Monkey in Palo Duro Canyon here.
No longer in use for many years. Too bad.
The Cog train up Pike's Peak in Colorado.
I don't remember the name but one in Cripple Creek ,Colorado.
Cumbres Toltec at Chama NM to Antonita Colorado.
Small train at Royal Gorge ,Colorado.
Some others at various amusement parks.
BTW I've never been on an AmTrac