Saint-Malo is known for its beautiful sandy beaches, making it an ideal destination for a family trip. Spend a day at Plage du Sillon, the main beach in Saint-Malo, where you can relax on the sand, swim in the clear waters, or even try your hand at water sports like kayaking or paddleboarding. For a more secluded beach experience, head to Plage de l'Eventail or Plage du Mole, where you can enjoy some peace and quiet with your family.