Lavezzi Island, Corsica - The boat from Bonifacio lands on Lavezzi Island, an unspoilt nature reserve. It's one of L'Îles Lavezzis, an archipelago of tiny boulder islets scattered amid the straits – and it's teeming with sea life. Wade in with your snorkel and mask from one of the little bays and look out for the shoals of friendly grouper fish.
Rondinara, Corsica - Nature has been particularly kind to Rondinara. Part of the Bouches de Bonifacio Nature Reserve, this rugged-looking, uniquely shell-shaped, white sandy beach is sheltered from the wind, with calm, turquoise waters and a gently shelving shoreline, making it ideal for little ones. If you get peckish, there's also a restaurant, which hires out sunbeds and parasols too.