If you're spending some time in Les Ayguades, Beach of the Ayguades and Occitanie Beaches are top sights worth seeing.
While Port Rive Gauche isn't home to many top sights, Plage du Grazel rive gauche - Poste de secours no6 and Gruissan Beach are some notable places to visit nearby.
If you're looking for some top things to see and do in Ilot 11 and surrounding area, you can visit Plage des Chalets and Gruissan Beach.