How did we get cover the nearly 1200km for a round trip to Paris and still make it worth while to only be there one day. This is how. The TGV. Train à Grande Vitesse- literally “Train at Great Speed” no kidding. This would be meeting another train heading in the opposite direction. Us leaving Paris travelling at about 300km/h + train Paris bound travelling at around 300km/h = wow. Bear in mind these trains tend to be very long.