Just enter a Swiss station in the search field, then watch the trains come and go.
For an extra special treat; click on a moving train, then click the button “Follow” in the unfolding menu. This will show you the moving train via satellite images.
Note: This program does not show trains in real time. The program matches the Swiss rail schedule to the clock on your computer.
Just for fun, type in Jungfraujoch then switch to satellite view. Welcome to the top of the world! A person could spend hours following their tour itinerary with this program.