With our 15 day first-class EurailPass and reservation, on June 14th we took the 170mph TGV (Wikipedia) from Paris to Lyon, then proceeded to Switzerland. The distance from Paris (Gare de Lyon) to Lyon (Part-Dieu) is 425 km (xxx miles). I recall that the trip took about two hours, and that the ride was very smooth.

Kim pretending that he's bored on the train in in Switzerland (not the TGV)

view out the window

a better view out the window