The first leg of my trip is Paris-Irún by TGV.
This border town in the Spanish Basque Country, just across the border from Hendaye in the French Basque Country, is well known as a place to buy cheap cigarettes and to change trains. I'm hoping there's a bit more to the place as I don't smoke.
If it turns out to be a bit too sleepy, I'll take a short hop to San Sebastian.
We'll see on Tuesday! My train leaves Paris Montparnasse at 7.23 and takes about five hours.