Few things beat being beside the sea. Round up the family, throw together a picnic and get some fresh air at Plage de Kerhornou.
You'll find this stretch of coastline in Brittany. Once you've explored everything you want to at Plage de Kerhornou, have a look at nearby Pointe St-Mathieu Lighthouse, Trez Hir Beach, and Pointe de Kermorvan.