You can discover a lot of interesting information from going on a tour of a medical institution. Check to see if Avranches-Granville Hospital is open to the public while you're in town.
You'll be spoiled for sightseeing choice when spending time in Granville. Avranches-Granville Hospital is a great place to start here, but there are lots of other worthy places to enjoy. Saint-Martin de Brehal Beach, Christian Dior Museum, and Granville Lighthouse are close to the health care institution and will fill in your day nicely.