Venue

Besançon is the capital and principal city of the Franche-Comté area in the east of France. Located close to the France-Swiss border, it is the capital of time mechanisms. The city has one of the most beautiful historical centres which presents a remarkable ensemble of classic stone buildings, some dating back to the Roman era. The old town is enclosed in a broad horse-shoe part of the river (Doubs), which is blocked off at the neck by Vauban's imposing Citadelle.
   

The citadel, the city walls and Fort Griffon were added to the list of UNESCO World Heritage Sites in 2008, as part of the “Vauban's Fortifications” group.

Please find more information:
La Citadelle - UNESCO World Heritage  Wikipedia
Besançon's Tourist Board

The four airports closest to Besançon are:

• Euroairport Basel-Mulhouse (then about 1h45 drive (see here) or take the train to Besançon (see here))
• Geneva airport (then about 2h drive (see here))
• Lyon Saint Exupery airport (then drive about 2h30 (see here) or take the train to Besançon via Lyon Part Dieu (see here))
• Paris Charles de Gaulle airport (then take the train to Paris - Gare de Lyon (about 1 hour), then the high speed train (TGV) to Besançon (about 2h)).

IMPORTANT 2 railway stations: Besançon Franche-Comté TGV and Besançon Viotte (center of the town). Besançon can be accessed by train from

• Paris Gare de Lyon – Besançon Franche-Comté TGV or Besançon Viotte: about 2h - 9 high-speed trains per day
• Lyon – Besançon Franche-Comté TGV or Besançon Viotte: about 2h - 5 high-speed trains per day
• Strasbourg – Besançon Franche-Comté TGV or Besançon Viotte: about 2h - 5 high-speed trains per day

You can take a direct train to Besançon Franche-Comté TGV and then take the shuttle linking this station to Besançon Viotte (15minutes, 3€ or free depending on chosen station)
To book a journey, you can do it on line SNCF