The tour starts in Bordeaux, veers west to seaside Arcachon before heading east through Saint-Emilion, Sarlat-la-Canéda, Rocmadour, Toulouse and Carcassonne. We got around by train, except for the section between Sarlat-la-Canéda and Toulouse, where we took a chartered bus. French trains are clean and efficient, so we maintained a low carbon footprint while taking in the scenic views of southern France.