You'll want to browse the exhibits at Écomusée d'Ouessant and Musée des Phares et des Balises. Plage de Korz, Plage d'Arlan, and Plage du Prat are great spots if you want to spend some time by the water during your stay. You can enjoy nature at Plage de Yusin, Porzh ar Vagoù, or Porzh ar Roc'h Vran.