Yes, very much so. The variety of scenery you can see on a train is worlds apart from anything you see on a plane, although I do love seeing the curvature of the Earth's globe from a plane window.
Plus, you can see it as a family sitting around a dining table in the train's dining car.
Speaking of California, Amtrak used to have a service from San Diego to Vancouver, Canada which went along the Pacific Coast in some parts. Maybe they still do. It was amazing, especially at night with a bright moon, and especially once you got past Portland, Oregon.