Take in the grandeur of Coutances Cathedral. Go to a mass if you can or simply wander around and enjoy the serenity.
This Coutances principal church is a good place to begin your day of sightseeing. There's plenty to discover close by, like Chateau de Gratot, and Coutances Botanical Garden. Wander around at your leisure at Coutances Cathedral before hitting up these other fine sights.