The old town of Briançon (UNESCO) is a must to visit with its small cobbled streets, fountains, the Collegiate church, the surrounding fortresses, etc...
You can go on a guided tour of the
Cordeliers Church (15th century), Fort des Têtes fort (18-19th century) or the Notre Dame, Saint Nicolas Collegiate Church (18th century).
Also in Briançon : casino, swimming complex, ice rink, tennis courts
(indoor and outdoor), bowling, cinemas...