he walled city is the place to visit in Concarneau. But the visit doesn't stop here. You can also:

Visit the Fishing Museum: http://www.musee-peche.fr/fr/
Visit Keriolet Castel: http://www.chateaudekeriolet.com/
Take a ferry to Les Glénan islands: http://www.croisieresbleues.fr/
Relaxing in Thalasso of Concarneau: http://www.concarneau-thalasso.com/
Take a sunbath at Kernevel, Sable Blanc, Cap-Coz beaches...
Make a gastronomic stop in "Les Sables Blancs": http://www.hotel-les-sables-blancs.com
Get full informations: http://www.tourismeconcarneau.fr/

Visit the Fishing Museum: http://www.musee-peche.fr/fr/