Where to next?

Whenever we’re contemplating a destination, we look for advice from friends, but then I realized – some of  you out there might be where-to-wizards, and so here goes: We’re looking for a destination near the French/Swiss border – at the moment we’re contemplating Lyon, France. Any suggestions for what to do there or if there’s another spot we ought to head towards? If yes, hit the comment button and let’er rip.